Abstract
Purpose :
Conjunctival tissue deformation due to scleral lens (SL) wear has been documented in the literature. This study evaluated whether this tissue deformation may affect initial impression based scleral lens fitting by comparing the number of lenses needed to achieve a finalized fit with impression-based scleral lenses (ibSL) in patients with a recent history of scleral lens wear and those without any history of scleral lens wear.
Methods :
An impression is obtained of the globe, utilizing a low viscosity, addition polymerizing polyvinylsiloxane impression material. The resulting mold of the globe is 3D scanned, modeled, and used to develop a scleral lens which vaults the cornea and mirrors the 3D model of the unique corneoscleral shape. A retrospective chart review of patients fit with ibSL (EyePrintPro and EyeFit, EyePrint Prosthetics, US) from 2015 to 2022. 247 eyes were included in the study. Principal outcomes measured were the number of remakes to achieve an acceptable final lens. All patients with a recent history of scleral lens wear discontinued SL wear for a minimum of 7 days prior to ocular impression.
Results :
Of the 247 eyes fit, 139 eyes were previously SL wearers and 87 were new SL wearers (virgin eyes). The average number of ibSL needed to finalize a fit was 2.3 ± 1.3 for the new SL wearers versus 3.0 ± 2.2 for the previous SL wearers (p=0.02).
Conclusions :
Patients with a recent history of scleral lens wear required more ibSL remakes to achieve a final lens than those without a history of scleral lens wear.
This abstract was presented at the 2023 ARVO Annual Meeting, held in New Orleans, LA, April 23-27, 2023.