Unbiased look at Implantable Miniature Telescope cases: Visual acuity and rehabilitation outcomes

Title Unbiased look at Implantable Miniature Telescope cases: Visual acuity and rehabilitation outcomes
Author, Co-Author Sherry Day, Donna Wicker, Ashley Howson
Topic Low Vision
Program Number
Ballroom A-B
University of Michigan, Kellogg Eye Center

Purpose: Assess improvements in visual acuity in pre- and post-op implant eye and the fellow (non-implant) eye and also to track achievement of functional goals at the time of discharge.

Method: We reviewed IMT patient charts that completed IMT surgery and post-surgical rehabilitation from January 2013 through May 2016.  Outcome measures included change from baseline in BCVA in IMT eye as well as the fellow eye.  Patients' functional goals were reviewed as well as Canadian Occupational Performance Measure (COPM) changes in satisfaction and performance.

Results: The average BCVA improvement in IMT eye was +3.3 lines.  The fellow eye improved by an average of +1.6 lines.  Five of the six patients had a functionally significant change in COPM scores.  The average improvement in performance was 3.4 and in satisfaction was 3.1.  Except for one patient who had significant health issues, all other patients achieved their functional goals.

Conclusion: IMT can provide an improvement in BCVA.  Surprisingly, vision also improved in the fellow eye in 4 of 6 cases with a range between 1 to 5 lines.  Perhaps, this is due to using the fellow eye for all mobility tasks when they might not have used the fellow eye as much prior to IMT surgery.  It can be an issue if the fellow eye improves beyond the IMT eye since this surgery and rehabilitation process relies on using the fellow eye for mobility and the IMT eye for details.  As assessed by COPM, patients improved in both performance and satisfaction scores.  In addition, 5 of the 6 patients with IMT achieved their functional goals, which included watching grandchildren, writing, reading and even bowling.  In conclusion, IMT may be a valuable tool to enhance quality of life for patients over 65 with stable but severe macular degeneration.

Affiliation of Co-Authors University of Michigan, University of Michigan