Contact Lens Management On Irregular Cornea. Effect Of Contact Lenses On Cornea

Indian Journal of Applied Basic Medical Sciences
Year: 2019, Volume: 21(B), Issue. (2)
First page: (169) Last page: (175)
Online ISSN: 2249-7935
Print ISSN: 0975-8917
doi:

Contact Lens Management On Irregular Cornea.  Effect Of Contact Lenses On Cornea 
Atanu Samanta1*
and  Nitin V Trivedi2
1,2M. Optom., FIACLE. Nagar School of Optometry, Ahmedabad.
Corresponding author email id: atanuoptom@yahoo.co.in

Online Published on 02-Jul-2019

ABSTRACT

Purpose: Irregular astigmatism due to epithelial irregularities, epithelial and stromal dystrophies or corneal degenerations and ectasias cannot be sufficiently corrected with spectacles, and rigid gas permeable (RGP) contact lenses have become the mainstay of the treatment. This study was designed to find out Relation between lens wear and corneal surface changes, longstanding management of corneal irregularity with contact lenses without disturbing the corneal health. Method: Study design Retrospective case evaluation which was approved by NHL Institutional Review Board. The study was conducted according to tenets of Declaration of Helsinki. Considering proportion of subjects with positive changes in follow-up visits to be 60% for study power of 80% we need sample size of 100 subjects. Total 121 eyes of 98 subjects enrolled in the study. where 54%(53) were male and46%(45) were females, among all 55 keratoconus, 5 keratoglobus, 14 PMD, 17 Post LASIK, Post trauma, 18 Post PK and 3 Epithelial irregular corneal astigmatic eyes were fitted with suitable different types of contact lenses. Among keratoconus total 42(76.36%) and all 5(100%) keratoglobus subjects underwent corneal collagen cross linking with riboflavin at least one year before lens trials. Among post LASIK ectasia subjects all diagnosed with corneal irregularities at least 12 month before lens trials, 12(70%) of them underwent post LASIK corneal collagen cross linking with riboflavin at least before 6 months of lens trials. Post trauma corneal repair and in post penetrating keratoplasty lenses were tried only after 1 year post surgery. Conclusion: As per the findings, contact lenses do not produce much of alterations on corneal structure if fitted well.

Keywords

keratoglobus, ectasia, surgery, keratoplasty, trauma

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