Nguyen Duc Trong
Hai Yen Eye Clinic, Vietnam
Title: Overnight wearing ortho-K contact lenses in 40 patients at Hai Yen Eye Center, Vietnam
Biography
Biography: Nguyen Duc Trong
Abstract
Aim/Purpose: The purpose of this study is to report refractive error changes and visual outcome of number of patients using Cornea Refractive Therapy.
Methods: This is a single-center retrospective descriptive study of 40 patients (80 eyes) including 11 male and 29 female, mean age 14.53±2.84, wearing Fargo overnight Ortho-K contact lenses from May 2014 to February 2016.
Results: The result shows mean uncorrected visual acuity (UCVA) at distance of pre-treatment is 1.22±0.17 logMAR; post-treatment one week, one month and three months are 0.23±0.0.25 logMAR, 0.19±0.23 logMAR 0.19±0.24 logMAR respectively. Mean spherical equivalent refractive error (SER), mean spherical power (SP), mean astigmatism (AS) of pre-treatment are -5.52 ±2.26D (from -2.00D to -10.88D), -4.96±2.08D, -1.12±0.94D appropriately. Mean SER; mean SP, mean AS of three months post-treatment are -0.62±1.11D, -0.17±0.93D, -0.90±0.64D. There are statistically significant changes in UCVA (p<0.0001), SER (p<0.0001), SP (p<0.0001), AS (p=0.01) at three months post-treatment compared with pre-treatment. There are no statistically significant difference of UCVA and SER at one month and three months.
Conclusion: In conclusion, visual acuity and refractive error improve significantly and achieve stability after one month treatment of wearing Ortho-K lenses.