Analysis of visual quality after ICL V4c corrective surgery for highmyopia using the double-pass instrument
Journal Title: Guoji Yanke Zazhi - Year 2018, Vol 18, Issue 7
Abstract
AIM:To evaluate the effectiveness of visian implantable collamer lens with central hole(ICL V4c)implantation for the correction of high myopia using the double-pass visual quality analysis system. <p>METHODS: Totally 60 eyes of 30 high myopia patients who underwent ICL V4c implantation were enrolled into this prospective randomized control study. Myopic degree of selected patients was -6.0D to -12.0D, age 18 to 35 years old, best corrected visual acuity(BCVA)≥0.6, preoperative corneal astigmatism acuities ≤1.0D. All patients were taken the temporal side transparent corneal incision. The patients were evaluated postoperatively 1wk, 1 and 3mo respectively. The evaluating items included preoperative BCVA, postoperative uncorrected visual acuity(UCVA), objective scattering index(OSI), and modulation transfer function(MTF)cut off frequency, Strehl ratio(SR), and 100%, 20%, 9% Optical Quality Analysis System(OQAS)Value(OV, contrast visual acuity). All statistical analyses were performed with SPSS19.0 statistical software. Variance analysis of repeated measurement data was employed. <p>RESULTS: The UCVA gradually improved at 1wk, 1 and 3mo after surgery. There was statistical significance compared with the preoperative BCVA(<i>P</i><0.01). The postoperative OSI, MTF cut off, SR, OV 100%, OV 20% and OV 9% at 1wk, 1 and 3mo showed statistically differences compared with the preoperative values(<i>P</i><0.05). <p>CONCLUSION: ICL V4c implantation can effectively correct high myopia range from -6.0D to -12.0D. The postoperative OSI were smaller than the preoperative OSI. The postoperative UCVA were better than the preoperative BCVA. The value of postoperative MTF cut off, SR, and OV value of 100%, 20% and 9% improved.
Authors and Affiliations
Hai - Wu Li
Keywords
Related Articles
- EP ID EP555580
- DOI 10.3980/j.issn.1672-5123.2018.7.47
- Views 114
- Downloads 0
Analysis of the influencing factors of interface operation in femtosecond laser assisted cataract surgery
AIM: To discuss the influencing factors of interface operation in femtosecond laser assisted cataract surgery(FLACS). <p>METHODS: From March 2016 to October 2017, 44 patients(44 eyes)were enrolled in this study who had a...
Effects of LASIK on ocular surface by femtosecond laser or mechanical microkeratome for creating corneal flap
AIM:To investigate the effects of laser <i>in situ</i> keratomileusis(LASIK)on ocular surface by femtosecond laser or mechanical microkeratome for creating corneal flap, and to study the effect of different corneal flap...
Effect of infusion pressure on retinal structure and function during cataract surgery
With cataract surgery become commonly performed, to pursue efficiency of the surgery, ophthalmologists prefer to increase vacuum during phacoemulsification. High vacuum can cause the instability of the anterior chamber,...
Correlation between the RNFL thickness and HbA1c in patients at early stage of type 2 diabetes
AIM: To investigate the relationship between the glycosylated hemoglobin(HbA1c)and retinal nerve fiber layer(RNFL)thickness in patients at early stage of type 2 diabetes. <p>METHODS: Totally 58 patients at early stage of...
A review of behavioral visual acuity tests for rodents
Rodents have been used widely in the research of eye diseases to study visual function in animal models. Two methods of visual acuity testing in animals have been internationally recognized: the electrophysiological visu...