On April 6, MCLS hosted a course and wet lab in corneal gas permeable lens fitting, sponsored by ABB Optical Group at Dr. Brooke Messer’s clinic, Cornea and Contact Lens Institute of Minnesota (CCLIM), in Edina. We had 10 registrants and featured Dr. Matthew Lampa, OD, FAAO as moderator.
Dr. Lampa reviewed the distinguishing corneal characteristics of keratoconus, astigmatism and high myopia and a variety of corrective errors to give the group a general overview of how corneal topography can assist in gas permeable fittings when using both axial and elevation formats.
Four patient volunteers presented to CCLIM in previous months for evaluation of corneas and corrective errors and a variety of lens designs were ordered through ABB optical which provided the lenses at N/C to the subjects. Four exam rooms were used for the evaluation of the respective lens designs and the students were mentored by Dr. Lampa and Dr. Holland as well as two board members, Steve Queenan and John Cavanaugh, experienced GP fitters.
The patients had their lenses inserted and in the four examination rooms, small groups of students had the opportunity to evaluate the fits by slit lamp (SL) methods under both white light and fluorescein with Wratten filter.
The volunteer patients were queried about vision and comfort and each student used the slit lamp to observe cornea lens clearance, edge clearance and centration with blinking and between blinks. Two of the patients had prior experience in GP lenses; whereas, the others had either hybrid or softlens histories.
How these lenses were selected (based on corneal topography, corneal pathology and vision needs) was addressed by the mentors and through inquiry by the students and inquiry by the students in the wet lab. The process of fitting to trial evaluation in this non-credit course was a first step toward the student experience of fitting GP lenses.
Dr. Lampa is an Associate Professor at Pacific University College of Optometry in Portland OR and is involved in clinical research, lens instruction and specialty contact lens fittings.
Submitted by: John Cavanaugh