Assessment Of Visual Function And Optical Performance Of Two Monofocal Implants With Different Spherical Aberration Profile

To evaluate the optical and visual performance of two monofocal implants with different spherical aberration profile . Tecnis Eyhance and Envista Aspire based on visual acuity at distance, modulation transfer function by itracing and an Assessment of IntraOcular Lens Implant Symptoms questionnaire (AIOLIS, a 37-item FDA-qualified tool assessing ocular symptoms).

Private Practice, Baltimore, MD, US

A retrospective analysis was performed on consecutive cases of 81 patients, 129 eyes who underwent IOL implantation with either Envista Aspire ( 69 eyes) and Tecnis Eyhance ( 61 eyes). Patients were categorized based on the corneal aberration profile, those with negative corneal spherical aberration had the Envista Aspire  and the ones with positive spherical aberration has Tecnis Eyhance. Three months post the visual and optical performace was evaluated BCVA and UNVA at distance, MTF masure by ray tracing  ( Itrace Technology) and AIOLIS questionnaire . Exclusion criteria were  compication during cataract surgery, ocular comorbidities that could affect VA. Secondary outcomes were AL and K1 and K2  measured with IOL master 700 Zeiss.

The post op  UCVA  0.3 LogMar and BCVA 0.1 LogmAR were statistically similar in both groups. The MTF analysis at 4 mm and 6 mm.  50 lp/mm ( dist clarity) and 100 lp/mm (fine details) were Eyh. mean 0.28 at 50 lp/mm and 0.17 at 100 lp/mm. The results for EA were 0.31 at 50 lp/mm and 0.19 at 100 lp/mm. The AIOLI responses to Visual satisfaction in both groups correlated with UNVA at dist., report of glare and halos was not statistically significant bewteen both groups. Contrast sensitivity and night vision patients in the EA group reported fewer symptoms but there was visually significant difference. Pat with UNVA of 20/40 or worst in both groups reported problems with night driving. The overall score to the AIOLIS questionnaire was positive.

This is the first study to integrate the AIOLIS questionnarie to the clinical results and optical metric performance for a comprehensive assesment of the post op results of selecting intraocular  of implants with different spherical aberration profile in correlation with the patients corneal aberration. Reinforcing the need of patient specific IOL selection even in monofocal implants.