15-Year Cumulative Dynamic Retreatment Rate After Lasik, Smile Or Presbyond Laser Blended Vision Stratified By Age And Refractive Correction

To report the retreatment rate over a 15-year period after LASIK, SMILE or PRESBYOND Laser Blended Vision stratified by age and refractive correction.

London Vision Clinic, London, UK

Retrospective analysis of LASIK, SMILE and PRESBYOND treatments at London Vision Clinic between 2002-2017 using the MEL 80/90 excimer laser and Hansatome microkeratome or VisuMax femtosecond laser. Cumulative dynamic retreatment analysis was performed for 1, 2, 3, 5, 10, and 15 years. Retreatment rate was calculated as number of eyes retreated divided by how many eyes had been treated up to that time-point with that time since primary surgery. Retreatments were performed for any patient who could achieve at least 1-line improvement in UDVA or UNVA, without any visual acuity restrictions. The population was grouped by age and refraction error.

Retreatment rates are reported for 1, 2, 3, 5, 10, and 15 years respectively. Young myopia: retreatment rates for patients aged under 40 with myopia up to -8.00 D (n=10,265) were 2%, 3%, 4%, 5%, 11%, and 15%. Young high myopia: retreatment rates for patients aged under 40 with myopia above -8.00 D (n=1,393) were 7%, 11%, 14%, 19%, 37%, and 46%. PRESBYOND myopia: retreatment rates for myopic patients aged over 40 (n=5,458) were 9%, 14%, 16%, 18%, 29%, and 31%. PRESBYOND hyperopia: retreatment rates for hyperopic patients aged over 40 (n=6,330) were 8%, 15%, 18%, 22%, 37%, and 46%. PRESBYOND emmetropia: retreatment rates for patients aged over 40 (n=1,566) were 8%, 13%, 16%, 20%, 36%, and 73%.

Cumulative dynamic analysis enables the retreatment rate to be evaluated in the context of time after surgery, such as “after 1 year, there is an X% chance that you will have had a retreatment”. This method will help to communicate to patients the likelihood of needing further treatment and better understand the longevity of the treatment.