Small Aperture Intraocular Lens In Irregular Corneas, 5 Years Experience

Change in corneal chape after RK, PKP and keratoconus make it more challenging to pick the right Intraocular lens power in cataract surgery. The small aperture Intraocular lens presents as an opportunity in these special situations.

Conducted in Centro de Investigacion y Fundacion Dr. Jose Antonio Quesada Rodriguez, Clinica Quesada, El Salvador

Case reports Case 1: Cataract surgery after RK (16 cuts) OU. Case 2: Cataract surgery after PKP OS. Case 3: Cataract surgery in Keratoconus eye OS

Case 1: female 68 YO cataracts, previous RK (16 cuts) preop BCVA 20/150 OD, K1 26.99, K2 30.76. preop BCVA 20/100 OS, K1 32.52, K2 34.94. Small aperture IOL OU (+18.0) 5 years post op UCVA 20/30- distance, 20/40 intermediate, 20/40 near. Case 2: female 52 YO, PKP OS BCVA 20/200, K1 35.85, K2 44.79, post op 5 years UCVA 20/50 distance, 20/50 intermediate, 20/50 near. Case 3: keratoconus , female 57 YO, preop BCVA 20/100, Kq 43.32, K2 48.89. post op 5 years UCVA 20/50 distance, 20/50 intermediate, 20/50 near.

For post RK patients this lens can extend the depth of focus and provide excellent vision at distance, intermediate and near. The small aperture IOL in the presence fo irregular corneas (PKP or keratoconus) cuts off the disturbing portion of the light thas is aberrated by the irregularity. The point spread function of the retina image is sharp, and the brain accepts the elongates focus.