PURPOSE: To compare the efficacy and safety of anterior capsulotomy creation with a new selective laser device (CAPSULaser) with those of manual capsulotomies. SETTING: GEMINI Eye Clinic, Zlin, Czech Republic. DESIGN: Prospective case series. METHODS: Patients were placed in cohorts based on age and cataract grade and randomly allocated to have laser capsulotomy or manual continuous curvilinear capsulorhexis (CCC). The anterior capsule was stained with microfiltered trypan blue 0.4%. The anterior capsulotomy was created with the laser device focused on the anterior capsule through a custom patient interface lens. Intraoperative video analysis with the use of an intraocular ruler and postoperative examinations were used to assess safety and efficacy (accuracy of capsulotomy size, circularity, centration). RESULTS: No intraoperative complications occurred in the laser group or the manual group. All capsulotomies in the laser group were free-floating with no tags or tears. The mean capsulotomy diameter was 5.03 mm overall (range 4.8 to 5.2 mm, laser group; 4.4 to 5.8 mm, manual group). In the laser group, all the capsulotomies were within 0.1 mm ± 0.1 (SD) of the target. The circularity accuracy was greater than 99.0% ± 1.0%; the mean centration of the capsulotomy in relation to the intraocular lens (IOL) was 0.1 ± 0.1 mm. All parameters were statistically significant (P < .01). The IOL-capsulotomy overlap was 360 degrees in all laser cases. CONCLUSIONS: Selective laser capsulotomy using a new proprietary trypan blue formulation was safe and effective in cataract surgery. The sizing, circularity, and centration of the laser capsulotomy were more accurate than those of the manual CCC, resulting in consistent 360-degree IOL coverage.

• MeSH
• barvicí látky aplikace a dávkování   MeSH
• capsulorhexis metody   MeSH
• dospělí MeSH
• fakoemulzifikace * metody   MeSH
• implantace nitrooční čočky * MeSH
• katarakta komplikace   MeSH
• laserová terapie škodlivé účinky   přístrojové vybavení   MeSH
• lidé středního věku MeSH
• lidé MeSH
• přední pouzdro oční čočky chirurgie   MeSH
• prospektivní studie MeSH
• pseudofakie patofyziologie   MeSH
• senioři MeSH
• trypanová modř aplikace a dávkování   MeSH
• výsledek terapie MeSH
• zraková ostrost fyziologie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• barvicí látky MeSH
• trypanová modř MeSH

PURPOSE: To prospectively compare postoperative results of two premium intraocular lenses EnVISTA (Bausch and Lomb) and AcrySof IQ (Alcon), focussing on glistenings and posterior capsule opacification. The evaluation of glistenings was done using Image J software and posterior capsule opacifications were quantified with OSCA system. METHODS: Twenty patients (7 men and 13 women) with bilateral cataract were included. EnVista intraocular lens (IOL) was implanted in one eye and AcrySof IQ IOL in the second eye of each patient. Objective evaluation methods were used for assessment. Glistenings was quantified with ImageJ software and PCO using the Open-Access Systematic Capsule Assessment (OSCA) system (Devised by Aslam TM, Edinburgh, United Kingdom). Complete ophthtalmological evaluation including evaluation after pupil dilatation was done and digital images of intraocular lenses were obtained. The results of 2-, 4-, 6- and 12-month follow-up were compared. RESULTS: Twenty patients were analyzed 2 months, 16 patients 4 months, 14 patients 6 months and 13 patients 12 months after cataract surgery. There was only minimal difference in best corrected visual acuity between EnVista and AcrySof group. The glistenings in the EnVista IOLs was objectively lower than in the AcrySof IOLs during whole follow-up period. In contrast to PCO, in eyes with AcrySof IOL was lower PCO score. CONCLUSION: Development of new materials and techniques of cataract surgery is the topic of ophthtalmologists worldwide. Reduction of glistenings and PCO is one of the main aims, objective measurements is important part of assessment of postoperative results after cataract surgery. KEY WORDS: glistenings, posterior capsule opacification, EnVista, AcrySof IQ, Image J software, OSCA system.

• MeSH
• akrylové pryskyřice MeSH
• extrakce katarakty MeSH
• fakoemulzifikace metody   MeSH
• implantace nitrooční čočky * MeSH
• lidé MeSH
• následné studie MeSH
• nitrooční čočky * MeSH
• pooperační období MeSH
• prospektivní studie MeSH
• protézy - design MeSH
• pseudofakie patofyziologie   MeSH
• senioři MeSH
• výsledek terapie MeSH
• zkalení zadního pouzdra čočky patofyziologie   MeSH
• zraková ostrost fyziologie   MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• srovnávací studie MeSH
• Názvy látek
• akrylové pryskyřice MeSH

PURPOSE: The aim of the study was evaluation and comparison of rotational stability and the effect of multifocal toric intraocular lens rotation (T-MIOL) at visual quality of two types of intraocular lens AcrySof IQ ReSTOR Toric SND1Tx (Alcon Laboratories, Inc.) and AT LISA toric 909M (Carl Zeiss Meditec AG). There was evaluated a pseudophakic dysphotopsia based on patients subjective feelings as well as the independence on glasses and overall satisfaction with the visual quality after T-MIOLs were implanted. METHODS: The retrospective study included 68 eyes (100 %) of 34 patients, who underwent an uncomplicated cataract surgery with multifocal toric intraocular lens was implanted. 68 eyes were divided into two groups. Group A consisted of 48 eyes (70,6 %) with AcrySof IQ ReSTOR Toric SND1Tx and group B included 20 eyes (29,4 %) with AT LISA toric 909M multifocal toric intraocular lenses were implanted. The T-MIOL position, planned axis and misalignment were evaluated one week and 6 months after surgery. Surgical lens reposition was indicated in case of worsening visual quality due to T-MIOL rotation from its planned position. RESULTS: In the group of 68 eyes, the mean uncorrected distance visual acuity (UDVA) before surgery was 0,08 (n = 48) in group A and 0,09 (n = 20) in group B. The mean UDVA after T-MIOL were implanted improved to 0,83 ± 0,06 (n = 48) in group A and 0,75 ± 0,08 (n = 20) in group B. The mean UDVA in patients before T-MIOL surgical rotation was 0,57 ± 0,03 (n = 5) in group A and 0,59 ± 0,08 (n = 5) in group B. At six months after T-MIOL surgical rotation, the uncorrected distance visual acuity was 1,0 in both groups (p = 0.70). The surgical rotation of T MIOL was performed in 10 eyes (14,7 %) of 68 eyes (p = 0.48), in group A (n = 48) in 5 eyes (10,4 %) and in group B (n = 20) in 5 eyes (25,0 %). Mean deviation from the planned axis was 8,2 ± 1,78 degrees in group A and 13,4 ± 3,04 degrees in group B. At six months postoperatively, the T-MIOL rotational stability showed less than 5 degrees for all surgically rotated lenses in both groups. Mean cylinder decreased in all patients from -2,92 ± 1,85Dcyl to -0.85 ± 0.61Dcyl after surgery. The mean spherical equivalent for all patients decreased from 0,56 ± 4,75D to 0,06 ± 1,33D after surgery. Presence of disturbing fotic phenomenon had reported 11 (32.4 %) of 34 patients, 9 of them they were subsequently indicated T-MIOL reposition. All 34 patients were able to perform normal daily tasks independently on spectacle correction. At six months after surgery, there was very high satisfaction with the quality of postoperative vision in both groups. CONCLUSION: Implantation of toric multifocal intraocular lens, both of AcrySof ReSTOR Toric SND1Tx (Alcon Laboratories, Inc.) and AT LISA toric 909M (Zeiss Meditec AG Carl) in cataract patients is safe and effective method to correct corneal astigmatism and maintain the visual multifocality. Early surgical T-MIOL reposition should be performed to put the T-MIOL to planned axis in steepest meridian if unwanted lens rotation is identified. KEY WORDS: cataract surgery, toric multifocal intraocular lens, rotation, rotational stability, quality of vision.

• MeSH
• astigmatismus patofyziologie   MeSH
• fakoemulzifikace metody   MeSH
• implantace nitrooční čočky * MeSH
• lidé středního věku MeSH
• lidé MeSH
• multifokální intraokulární čočky * MeSH
• posunutí nitrooční čočky patofyziologie   MeSH
• pseudofakie patofyziologie   MeSH
• retrospektivní studie MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• spokojenost pacientů MeSH
• zraková ostrost fyziologie   MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

AIM: The aim of our study was to evaluate the outcome of cataract surgeries with implantation of intraocular trifocal toric lens, and to study the accuracy of astigmatism correction, lens rotational stability, and safety of the procedures. PATIENTS AND METHODS: Our study comprised 22 eyes of 16 patients who underwent unilateral or bilateral implantation of AT LISA tri toric 939MP, or its implantation in combination with AT LISA tri 839MP. Mean patient age was 58 ± 11 years (39 to 75 years). Mean follow-up was 5 months. Evaluated parameters were preoperative and postoperative decimal corrected (CDVA) and uncorrected (UDVA) distance visual acuity. Uncorrected near (UNVA) and intermediate (UIVA) visual acuity was obtained with Jaeger optotypes. Furthermore, we studied manifest refraction, amount of corneal astigmatism, implanted lens position, and potential complications. Using two types of questionnaires we surveyed patients on their subjective satisfaction with vision. RESULTS: Spherical equivalent changed from preoperative -1.32 ± 4.05 D (-9.25 to 4.00 D) to postoperative -0.23 ± 0.21 D (-0.75 to 0.00 D). Preoperative corneal astigmatism was -1.97 ± 0.76 D (-4.02 to -1.01 D), manifest astigmatism was -1.70 ± 1.26 D. After the surgery, manifest astigmatism significantly improved to -0.34 ± 0.37 D (p<0.001). Mean monocular UDVA increased from 0.26 ± 0.18 (0.05 to 0.60) to postoperative 0.88 ± 0.13 (0.60 to 1.00) (p<0.001). CDVA also improved significantly, from 0.57 ± 0.24 to a final value of 1.02 ± 0.07 (p<0.001). Mean postoperative monocular UNVA was Jaeger 1-2, UIVA corresponded to Jaeger 3-4.No serious complications were recorded. Based on the outcome of questionnaires, all patients are satisfied with their vision and they are independent of spectacles. CONCLUSION: In the present study we have obtained very good functional outcomes of vision at far, near and intermediate in cataract patients after trifocal AT LISA tri toric lens implantation. Also, total astigmatism in studied eyes was substantially reduced. The treatment led to a high subjective satisfaction of patients and to their independence of spectacles. KEY WORDS: trifocal toric intraocular lens, cataract, astigmatism, refractive outcomes, patient subjective satisfaction.

• MeSH
• dospělí MeSH
• fakoemulzifikace metody   MeSH
• implantace nitrooční čočky metody   MeSH
• katarakta patofyziologie   MeSH
• lidé středního věku MeSH
• lidé MeSH
• následné studie MeSH
• nitrooční čočky * MeSH
• prospektivní studie MeSH
• protézy - design MeSH
• průzkumy a dotazníky MeSH
• pseudofakie patofyziologie   MeSH
• refrakce oka fyziologie   MeSH
• senioři MeSH
• spokojenost pacientů MeSH
• výsledek terapie MeSH
• zraková ostrost fyziologie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

PURPOSE: To investigate the low mesopic contrast sensitivity function (LMCSF) of patients implanted with different modern optical bifocal and trifocal designs of multifocal intraocular lenses (mfIOLs). METHODS: This prospective, comparative, nonrandomized consecutive case series included 180 eyes that underwent cataract surgery. Six groups of eyes were differentiated: group A, eyes with the diffractive AT LISA tri 839MP; group B, eyes with diffractive FineVision; group C, eyes with the bifocal Lentis Mplus-LS313; group D, eyes with the diffractive bifocal Acri.Lisa 366D; group E, eyes with the diffractive apodized Acrysof ReSTOR SN6AD1; group F, as the control group, implanted with a monofocal spherical intraocular lens. The LMCSF was evaluated with the OPTEC® 6500 device at 3 months postoperatively using a luminance of 3 cd/m2. RESULTS: No significant differences among groups were detected in LMCSF for the spatial frequencies of 1.5, 3.0, 6.0, and 12.0 cpd (1.5 cpd: F = 1.81, p = 0.13; 3.0 cpd: F = 1.14, p = 0.14; 6.0 cpd: F = 1.87, p = 0.11; 12.0 cpd: F = 1.26, p = 0.29), but significant differences were found among groups for the spatial frequency of 18 cpd (F = 2.62, p = 0.03). When comparing the groups in pairs, only statistically significant differences were observed between groups E and F for the spatial frequency of 18.0 cpd (t = 3.27, p = 0.03) with better values for group F. CONCLUSION: No significant differences were observed in LMCSF among the different mfIOLs studied. The third focus of trifocal IOL models did not adversely affect the LMCSF. The ReSTOR SN6AD1 showed the poorest LMCSF for the highest spatial frequency analyzed when compared with the control group.

• MeSH
• citlivost na kontrast fyziologie   MeSH
• fakoemulzifikace * MeSH
• implantace nitrooční čočky * MeSH
• lidé středního věku MeSH
• lidé MeSH
• nitrooční čočky * MeSH
• prospektivní studie MeSH
• protézy - design MeSH
• pseudofakie patofyziologie   MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• vidění mezopické fyziologie   MeSH
• zraková ostrost fyziologie   MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

PURPOSE: To assess efficacy and patient satisfaction after cataract surgery and implantation of a new accommodative bioanalogic intraocular lens (IOL). METHODS: We evaluated the collected data of 48 patients with bilateral cataract surgery and Wichterle IOL (WIOL) implantation included in the Czech national observational registry. Monocular and binocular uncorrected distance visual acuity (UDVA), uncorrected intermediate visual acuity, uncorrected near visual acuity (UNVA), best spectacle-corrected visual acuity for distance (CDVA), best spectacle-corrected visual acuity for near (CNVA), distance-corrected near visual acuity (DCNVA), and distance-corrected intermediate visual acuity were evaluated 6 months after surgery. Subjective patient satisfaction was assessed at 3 months postoperatively. RESULTS: The mean monocular UDVA was 0.074 ± 0.108 logMAR, the mean monocular CDVA was 0.047 ± 0.125 logMAR, the mean monocular UNVA was 0.328 ± 0.146 logMAR, the mean monocular DCNVA was 0.339 ± 0.131 logMAR, and the mean monocular CNVA was 0.139 ± 0.107 logMAR. A total of 24 patients (50%) had no problems with any light phenomena. A total of 18 patients were very satisfied (37.5%), 11 were satisfied (22.9%), 15 (31.2%) were rather satisfied, 4 (8.3%) were rather dissatisfied, and 0 were dissatisfied. CONCLUSIONS: The WIOL-continuous focus polyfocal lens offers very good vision at far and intermediate distance comparable with other types of multifocal IOLs, and relatively good near vision, while the incidence of adverse side phenomena is relatively low.

• MeSH
• akomodace oka fyziologie   MeSH
• brýle MeSH
• fakoemulzifikace * MeSH
• implantace nitrooční čočky * MeSH
• lidé středního věku MeSH
• lidé MeSH
• nitrooční čočky * MeSH
• protézy - design MeSH
• pseudofakie patofyziologie   MeSH
• registrace * MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• spokojenost pacientů MeSH
• vidění binokulární fyziologie   MeSH
• zraková ostrost fyziologie   MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• pozorovací studie MeSH
• Geografické názvy
• Česká republika MeSH

PURPOSE: To determine the effect of pars plana vitrectomy (PPV) on oxygen saturation in retinal vessels in patients with diabetes and non-diabetes after a 1-year follow-up. METHODS: This was a prospective consecutive interventional case series in 82 eyes in 82 patients. The sample consisted of 25 patients with non-proliferative diabetic retinopathy with macular oedema based on vitreoretinal traction or epiretinal membrane (ERM) and 57 non-diabetic patients with macular hole and ERM. Automatic retinal oximetry (Oxymap Inc.) was used on all patients 24 hr prior to PPV, and it was also used 7 and 52 weeks after PPV (classic 20G or sutureless 23G). We analysed the data according to subgroup diagnosis and lens status. RESULTS: Arterial saturation increased significantly from 96.4 ± 2.9% at baseline to 96.6 ± 3.4% at week 7 and 97.3 ± 3.4% at week 52 (p < 0.0001; Friedman test). Vein saturation also increased significantly from 63.5 ± 7.9% at baseline to 66.1 ± 7.7% and 67.0 ± 7.2% at weeks 7 and 52 (p < 0.0001; Friedman test). The value of the arteriovenous (A-V) difference decreased significantly after vitrectomy from 32.8 ± 7.5% at baseline to 30.5 ± 7.5% and 30.3 ± 7.0% at weeks 7 and 52 (p < 0.0001; Friedman test). The subgroup analysis revealed that in patients with diabetes, there were no statistically significant changes in oxygen saturation in blood vessels or in the A-V difference after PPV. After vitrectomy, retinal vessel diameter reduced by about 3.5% in both groups of patients. Further, the analysis revealed that opacification of the lens leads to a decrease in oxygen saturation in contrast to a clear lens and pseudophakic IOLs. CONCLUSION: Oxygen saturation is higher in the retinal veins and arteries after PPV in patients with non-diabetes, and this lasts for at least 52 weeks. In contrast, in patients with diabetes, there is no increase in oxygen saturation in the retinal vessels after vitrectomy. After vitrectomy, retinal vessel diameter reduced in both groups of patients. Further, the nuclear cataract progression has substantial effect on oximetry results. Patients with nuclear cataract exhibited an increase in saturation in both arteries and veins, but the A-V difference remained the same.

• Klíčová slova
• automatic retinal oximetry, cataract, oxygen saturation, pars plana vitrectomy, retinal vessel blood saturation,
• MeSH
• diabetická retinopatie patofyziologie   MeSH
• fakoemulzifikace MeSH
• implantace nitrooční čočky MeSH
• katarakta vrozené   patofyziologie   MeSH
• kyslík krev   MeSH
• lidé středního věku MeSH
• lidé MeSH
• makulární edém patofyziologie   MeSH
• neovaskularizace sítnice patofyziologie   MeSH
• oxymetrie MeSH
• prospektivní studie MeSH
• pseudofakie patofyziologie   MeSH
• retinální cévy patofyziologie   MeSH
• senioři MeSH
• vitrektomie * MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• kyslík MeSH

PURPOSE: To evaluate the visual, refractive, contrast sensitivity, and aberrometric outcomes as well as the patient quality of life and photic phenomena disturbances after cataract surgery with implantation of a new trifocal toric intraocular lens (IOL). SETTINGS: Premium Clinic, Regional Hospital in Havlickuv Brod, Czech Republic, and Vissum and Universidad Miguel Hernández, Alicante, Spain. DESIGN: Prospective consecutive series of cases. METHODS: The study involved eyes with corneal astigmatism of 1.25 D or more that were having cataract surgery with implantation of the trifocal toric IOL AT Lisa tri toric 939MP (Carl Zeiss Meditec). Visual outcomes and astigmatic changes analyzed by Alpins vector analysis were evaluated at 3 months postoperatively. Contrast sensitivity, quality of life, and photic phenomena were also evaluated. RESULTS: The study involved a total of 30 eyes of 16 patients, age 37 to 64 years. A significant improvement with surgery was observed in uncorrected distance, intermediate, and near visual acuity (P ≤ .01). A significant decrease in the refractive cylinder was observed postoperatively (P < .01), with all eyes showing a postoperative astigmatism below 1.00 D. The difference between targeted and surgically induced astigmatism was small (0.06 ± 0.30 D) but statistically significant (P = .04). The mean magnitude of angle of error was 5.80 ± 8.47 degrees. The low levels of higher-order aberrations found postoperatively were consistent with the good levels of contrast sensitivity achieved. Regarding quality of life, low to moderate levels of difficulty in performing various types of vision-related tasks were found. CONCLUSIONS: The trifocal toric IOL evaluated provides effective restoration of visual function after cataract surgery, with associated high levels of visual acuities and quality of life. FINANCIAL DISCLOSURE: The authors have no proprietary or commercial interest in the medical devices that are involved in this manuscript.

• MeSH
• citlivost na kontrast fyziologie   MeSH
• dospělí MeSH
• fakoemulzifikace * MeSH
• implantace nitrooční čočky * MeSH
• kvalita života MeSH
• lidé středního věku MeSH
• lidé MeSH
• nitrooční čočky * MeSH
• prospektivní studie MeSH
• protézy - design MeSH
• průzkumy a dotazníky MeSH
• pseudofakie patofyziologie   MeSH
• refrakce oka fyziologie   MeSH
• rohovkové aberace patofyziologie   MeSH
• spokojenost pacientů MeSH
• zraková ostrost fyziologie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

PURPOSE: To evaluate the visual, refractive, contrast-sensitivity, and aberrometric outcomes during a 1-year follow-up after implantation of a trifocal intraocular lens (IOL). SETTING: Premium Clinic, Teplice, Czech Republic. DESIGN: Prospective case series. METHODS: This study included eyes of patients having cataract surgery with implantation of the trifocal IOL model AT Lisa tri 839MP. Distance, intermediate (66 and 80 cm), and near (33 and 40 cm) vision; contrast sensitivity; aberrometric outcomes; and the defocus curve were evaluated during a 12-month follow-up. The level of posterior capsule opacification (PCO) was also evaluated. RESULTS: In 120 eyes (60 patients), 1 month postoperatively, an improvement was observed in all visual parameters (P ≤ .03) except corrected near and intermediate visual acuities (both P ≥ .05). From 1 month to 12 months postoperatively, small but statistically significant changes were observed in uncorrected and corrected distance and near visual acuities (all P ≤ .03) and in uncorrected intermediate visual acuity (P = .01). In the defocus curve, no significant differences were found between visual acuities corresponding to defocus levels of -1.0 diopter (D) and -2.0 D (P = .22). The level of ocular spherical aberration decreased statistically significantly at 6 months (P < .001). Ocular and internal higher-order aberrations increased minimally but significantly from 6 to 12 months postoperatively (P < .001). The mean 12-month PCO score was 0.32 ± 0.44 (SD). Four eyes (3.3%) required neodymium:YAG capsulotomy. CONCLUSION: The trifocal IOL provided complete and stable visual restoration after cataract surgery during a 12-month follow-up, with good levels of visual quality. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.

• MeSH
• aberometrie MeSH
• citlivost na kontrast fyziologie   MeSH
• dospělí MeSH
• fakoemulzifikace * MeSH
• implantace nitrooční čočky * MeSH
• lidé středního věku MeSH
• lidé MeSH
• následné studie MeSH
• nitrooční čočky * MeSH
• prospektivní studie MeSH
• protézy - design MeSH
• pseudofakie patofyziologie   MeSH
• refrakce oka fyziologie   MeSH
• rohovkové aberace patofyziologie   MeSH
• senioři MeSH
• zkalení zadního pouzdra čočky diagnóza   MeSH
• zraková ostrost fyziologie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

PURPOSE: To determine the critical value of the angle kappa in connection with a higher risk of photic phenomena for the AcrySof ReSTOR and Tecnis multifocal intra-ocular lens (MIOL) on a standardized pseudophakic eye model. To analyse the impact of biometric value changes on the critical angle kappa. METHODS: Geometrical optic rules applied to a suitable optical model of the pseudophakic eye were used to calculate the critical value of the angle kappa for the Tecnis and three types of the AcrySof ReSTOR MIOLs. The angle kappa was defined as critical if the incident ray passed through the first ring's edge area. The influence of different positive optical corneal power (K), effective lens position (ELP) and axial length (AL) on the critical angle kappa (κc) was investigated. The dependence of κc on one of the parameters was studied for standardized values of the remaining parameters. RESULTS: The highest value of the critical angle kappa was evaluated for the Tecnis MIOL. The increase in ELP and K caused an increase in κc under the given conditions. On the contrary, an increase in AL led to lower values of κc. CONCLUSION: We demonstrated the dependence of the critical angle kappa on the central part of the MIOL and on biometric parameters of the eye, especially on the effective lens position. According to these results, we conclude that shallow anterior chamber depth in connection with a higher angle kappa is an important risk factor for pronounced photic phenomena after implantation of a diffractive MIOL.

• Klíčová slova
• angle kappa, anterior chamber depth, effective lens position, multifocal intra-ocular lens, photic phenomena,
• MeSH
• axiální délka oka MeSH
• implantace nitrooční čočky * MeSH
• lidé MeSH
• nitrooční čočky * MeSH
• optika a fotonika * MeSH
• pseudofakie patofyziologie   MeSH
• pupila fyziologie   MeSH
• rohovka fyziologie   MeSH
• teoretické modely * MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• srovnávací studie MeSH