The visual quality and safety analysis of Teenagers with high myopia after wearing orthokeratology

Abstract

Objective To observe the clinical effect and security of orthokeratology for teenagers high myopia correction. Methods Thirty teenagers with high myopia (60 eyes) were chosen that voluntarily accepted and continuously wear orthokeratology more than one year, aged 11 to 16 years old (-6.00~-8.00D), the average diopter of (-6.31±0.37)D. The naked eye sight, changes in corneal curvature, the change of aberration symptoms, visual disturbance and corneal complications were analyzed during one year wearing orthokeratology, retrospectively. Results After wearing lens 1 day, 1 week, 1 month, 3 months and 1 year, the naked eye eyesight (logMAR) were 0.48±0.20, 0.13±0.11, 0.09±0.08, 0.08±0.06, and 0.08±0.05. The corneal flat and steep K values reduced after 3 months wearing lens compared to not wearing, it was (4.34±0.90)D, (2.61±2.67)D (P <0.05), the difference was statistically significant. The corneal surface low-order and high-order aberration increased respectively after wearing lens by Pentacam corneal topography Zernike aberration analysis than before wearing (3.772±3.085)μm, (2.030±0.529)μm, (P <0.05), the differences were statistically significant. Corneal surface after low-order and high-order aberration increased respectively than wearing before (0.269±0.206)μm, (0.149±0.140)μm, (P <0.05), differences were statistically significant. During 1 year review, existing glare at night was 6.67% (4/60), of the afternoon blurred vision 13.33% (8/60), the lens adhesion by 23.33% (14/60). The incidence of cornea touched in the lens wearing 1 day, 1 week, 1 month, 3 months, a year were 35% (21/60), 23% (14/60), 6.67% (4/60), 3.33% (2/60), 5% (3/ 60), respectively. Aseptic corneal epithelium infiltrating had 1 case (1 eye). Conclusions Adolescent patients with high myopia (-6.00~-8.00D) wearing orthokeratology under the guidance of physicians can obviously improve the naked eye vision. It is safe and effective. The vision can not be accurately assessed after shaping according to the flat K value. The corneal surface lens aberration of high myopia patients with orthokeratology before and after is increased, prompting that the posterior surface of cornea can also play a role in the process of shaping cornea. Key words: Orthokeratology; High myopia; Vision; Safety; Aberration