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AIM: To investigate the effect of residual astigmatism on visual quality after phacoemulsification combined with regional refractive intraocular lens(IOL)implantation in patients with age-related cataract, and to evaluate the astigmatism inclusivity of regional refractive IOL.METHODS: Retrospective cohort study. The clinical data of 62 cases(73 eyes)of age-related cataract patients who underwent phacoemulsification combined with regional refractive IOL(Lentis Comfort LS-313 MF15)implantation from July 2020 to March 2022 at the ophthalmology department of our hospital were collected. They were grouped according to residual astigmatism at 6 mo postoperatively, taking 35 cases(40 eyes)with residual astigmatism of 0.75 D to 1.50 D as the experimental group, and 27 cases(33 eyes)with residual astigmatism ≤0.75 D as the control group. Visual acuity, defocus curves, objective visual acuity [wavefront aberrations, Strehl ratio(SR), modulation transfer functions(MTF)], subjective visual acuity(national eye institute visual function questionnaire-25), patients' satisfaction, and spectacle independence were compared between the two groups at 6 mo postoperatively.RESULTS:There was a difference in the preoperative astigmatism and the number of postoperative 6 mo residual astigmatism between the two groups(P<0.01). At 6 mo postoperatively, there was no difference in uncorrected distance, intermediate, and near visual acuity, objective visual quality, subjective visual quality, satisfaction, and spectacle independence between the two groups(P>0.05). The defocus curves showed that there was no difference in visual acuity between the two groups at all points in the +2.00 to -4.00 D defocus range of the additional spherical equivalent(P>0.05).CONCLUSION:Lentis Comfort LS-313 MF15 IOL was able to accommodate regular astigmatism of 1.50 D.
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AIM: To evaluate the visual quality of patients with high myopia and cataract who received micro binocular single vision implantation of Tecnis Symfony intraocular lens(IOL), hybrid implantation of Tecnis Symfony IOL and Tecnis ZMB00 multifocal IOL, and binocular implantation of AcrySof IQ Panoptix IOL.METHODS: A prospective non-randomized controlled study was conducted to select patients with high myopia and cataract who underwent phacoemulsification combined with IOL implantation in the First Affiliated Hospital of Baotou Medical College from August 2020 to March 2022. According to the different IOL implantation schemes selected by patients, they are divided into micro single vision group, hybrid group and trifocal group. The postoperative follow-up was 3mo. The observation indexes included uncorrected far(5m), middle(80, 60cm)and near(33cm)visual acuity at 3mo after operation, contrast sensitivity(CS), uncorrected defocus curve under far vision, subjective visual quality score and light interference at 1 and 3mo after operation.RESULTS: There was no significant difference among the three groups in uncorrected far(5m)and middle(60cm)visual acuity at 3mo after operation(P<0.05); Uncorrected middle(80cm)distance visual acuity in the micro single vision group was similar to that in the hybrid group, and both were better than that in the trifocal group(P<0.05); Uncorrected near(33cm)distance vision of the hybrid group showed the best, followed by the trifocal group, and the lowest was in the micro single vision group(all P<0.05). The CS of dark light plus glare(12, 18c/d)was the best in the trifocal group, followed by the hybrid group, and the lowest was in the micro single vision group(all P<0.05). The defocus curve at 3mo after operation showed a span of +1.00～-3.00D, and the visual acuity of the three groups was better than 0.3 LogMAR; In the span of -1.00～-1.25D, the visual acuity of the hybrid group and micro single vision group was better than that of the trifocal group(all P<0.05); In the span of -3.00～-3.50D, the visual acuity of the hybrid group was the best, followed by trifocal group, and the lowest was in the micro single vision group(all P<0.05). At 3mo after operation, there was no significant difference in subjective visual quality scores among the three groups(P<0.05). Light interference in the micro single vision group was higher than that of the other two groups at 1mo after operation(P<0.05), and it decreased in the three groups at 3mo after operation, with no statistical significance(P<0.05).CONCLUSION: The three IOL implantation schemes can provide excellent visual quality for patients with high myopia and cataract. The vision of the micro single vision group and the hybrid group is better in the span of -1.00～-1.25D, and the hybrid group performs the best near vision in the span of -3.00～-3.50D. Although the design of micro single vision can make up for the weakness of Symfony IOL's lack of near vision, it is still worse than the hybrid group and the trifocal group.
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AIM: To compare the change of visual quality of femtosecond-laser in situ keratomileusis ( FS-LASIK) and laser in situ keratomileusis ( LASIK) for myopia. METHODS: A retrospective case series. A total of 89 cases 178 eyes were chosen from Jan. 2014 to Dec. 2015. There were 46 cases (92 eyes) in FS-LASIK and 43 cases 86 eyes in LASIK. The visual acuity, refraction state, subjective visual quality score, high order aberration were measured at 6mo after surgery. RESULTS: All patients underwent operation smoothly, and no complication was observed during and after surgery; there was no statistically significant difference between two groups at visual acuity (P>0. 05). Postoperative diopter compared with preoperative expectations diopter difference is statistically significant between two groups (P CONCLUSION: Femtosecond laser corneal flap is more accurate and reliable and the discrete degree is smaller. It can make more thin corneal flap. Femtosecond laser disc of LASIK surgery compare with traditional mechanical plate layer knife following LASIK has better visual quality.
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?AIM:To evaluate the objective visual quality of patients who underwent corneal cross-linking for the keratoconus using double-pass analysis system.? METHODS: Advanced keratoconus patients who underwent UV - riboflavin corneal cross - linking from January to July 2015 were included. The outcomes of their objective scattering index ( OSI ) , predicted visual acuity ( VA ) , the cut - off frequency of modulation transfer function ( MTF cut- off ) , the Strehl ratio ( SR ) were compared before and 6mo after corneal cross-linking.?RESULTS: A total of 13 patients ( 16 eyes ) were included. There was no statistically significant difference between pre- and 6mo postoperative data in uncorrected visual acuity, best corrected visual acuity, refractions and mean value of Sim-k (P>0. 05). Non-invasive average tear film break up time ( NIAvg-BUT ) detected by the Sirius system decreased after corneal cross-linking ( P0. 05). Tear Film Analysis Mean OSI increased at 6mo postoperatively (P<0. 05).? CONCLUSION: The subjective visual quality isn’t effected by corneal cross-linking. The tear stabilities of patients are influenced by these operations at 6mo postoperatively. More observations on long-term effect are needed to be taken in the future.