Affiliation:
1. Chengdu University of Traditional Chinese Medicine
Abstract
Abstract
Purpose
This study aimed to analyze the influence of corneal parameters on the corneal shaping force.
Methods
This retrospective study enrolled 189 patients. According to the different spherical equivalent(SE), grouping as: A, SE≤-2.0D; B,> -2.0D and≤-3.0D; C, > -3.0D and≤-4.0D; D, > -4.0D and≤-5.5D。Some parameters were measured before OK was worn. The shaping force is the difference between the equivalent spheres before and after wearing OK.
Results
One day post-OK, △SE of A was significantly associated with hexagonal cells(6A); B were associated with Em and coefficient of variation (CV); C was associated with horizontal curvature radius(rf); D were associated with height difference and corneal biomechanical index (TBI); in multivariate analyses, △SE were associated with SE and total corneal thickness. For one week, C was associated with the corneal biomechanical index(TBI), and D was associated with rf and Em (P < 0.05). In the multivariate analyses,△SE was associated with SE,SRI, and total corneal thickness(P < 0.001).
Conclusions
The factors affecting the corneal shaping force under different SE were different, and different analyses should be performed on the individualized corneal parameters of children.
Publisher
Research Square Platform LLC
Reference23 articles.
1. The effect of treatment zone decentration on myopic progression during or-thokeratology;Chen RR;Curr Eye Res,2020
2. One-year results of the Variation of Orthokeratology Lens Treatment Zone(VOLTZ) Study:a prospective randomised clinical trial;Guo BY;Ophthalmic Physiol Opt,2021
3. Factors determining effective orthokeratology treatment for controlling juvenile myopia progression;Kong QH;Iran J Public Heath,2017
4. Prediction of orthokeratology lens decentration with corneal elevation;Chen Z;Optom Vis Sci,2017
5. Yang CH.Influence of overnight orthokeratology lens treatment zone decentration on myopoa progression;Wang AK;J Ophthalmol,2019