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EASYFIT FOR HEALTHY EYES

 

PRELIMINARY CLINICAL EXPLORATION OF SCLERAL LENS PERFORMANCE ON HEALTHY EYES by Melissa Barnett, OD, FAAO, FSLS, FBCLA

Download Published in the Journal of Contact Lens Research and Science.

Click Here : http://www.jclrs.org/index.php/JCLRS/article/view/32


Objectives The purpose of this study was to evaluate the performance (i.e., vision, comfort and fit) of spherical and front-surface toric scleral lenses in subjects with regular, healthy corneas and regular astigmatism. Methods Scleral lenses were fit in the eyes (n = 16) of healthy subjects (n = 9) with regular corneas, absent of pathology, and studied using an observational, multi-visit design. Lens fit was objectively evaluated by an experienced practitioner. Following 1 month of successful lens wear, participants completed subjective satisfaction surveys regarding the scleral lens wearing experience.

Results According to participant surveys, spherical and front-surface toric scleral lenses were subjectively preferred over soft toric or gas permeable contact lenses and spectacles in 88% of eyes, including in all eyes (n = 3) with only prior history of spectacle wear, but no contact lens wear. Seventy-five percent (75%) of eyes achieved visual acuity of 0.1 logMAR or better and all subjects achieved visual acuity with a scleral lens within 1 Snellen line of spectacle correction. Seventy-five percent of eyes achieved good subjective comfort with a scleral lens, including in all eyes (n = 3) with no prior contact lens wear. No participants reported poor subjective vision and/or comfort.

Conclusions Our findings suggest that subjects preferred the performance of a scleral lens (spherical or front-surface toric) compared to previously worn soft toric or gas permeable contact lenses, including subjects (n = 2) with no prior history of contact lens wear. Moreover, scleral lenses may provide a viable, alternative contact lens modality option for patients considering discontinuation of traditional soft toric and/or rigid contact lens wear; so long as the factors associated with hypoxia and increased intraocular pressure remain minimized.

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