Case report assisted and written by Jenna Goepner from the School of Optometry at Indiana University. Presumed graduation date of May 2026.
A 58 year old female presents for a comprehensive eye exam with habitual scleral contact lenses for keratoconus vision correction.
Entering visual acuities are 20/40 OD, OS and 20/30 OU in Scleral lenses. Best corrected visual acuities in glasses are 20/60 OD, 20/400 OS and 20/200 OU.
Initial Pentacam scan at this visit shows maximum K values of 93.1 OD and 91.2 OS. Slit lamp examination reveals corneal scarring OS. Due to symptoms of glare and halos, we ordered lenses with Higher order aberration (HOA) correction.
Prior to correction, the patient had HOA RMS values of 200 microns OD and 3.37 microns OS. Values above 0.4 microns are considered symptomatic.
With the Zenlens HOA correction lenses, the patients’ new RMS values are 0.39 microns OD and 0.57 microns OS. Visual acuities achieved with these lenses are 20/25 OD and 20/30 OS.
Images show CCLIM technology precisely measuring lens rotation down to 1 degree increments for extreme precision.
Comparison maps show significant reduction in RMS values after fitting the patient in HOA correcting lenses. Blue/Red bars are pre implementation. Orange bars are the HOA values after max correction resulting in decreased symptoms of glare and streaking light caused by corneal irregularities from keratoconus.
