Abstract: Objective To explore the clinical characteristics of cataract surgery after radial keratotomy (RK) and appropriate
calculation of intraocular lens (IOL) power. Methods Eight patients with cataract (12 eyes) after RK were treated in our
hospital from March, 2010 to June, 2013. The visual acuity, keratometric power and length of the ocular axis were examined
before the operation. For each patient, 3 groups of corneal curvature values were measured using a automatic keratometer
(TOPCON-KR8800) and the minimal K value was selected. Myopic or hyperopic posterior chamber IOL (-1.00 to -2.00 D) were
selected based on automatic calculations with SRK-T. Phacoemulsification and IOL implantation were then performed, and the
patients were followed up for visual acuity and refractive statuses at 3 months after the operation. Results All the 12 operated
eyes showed improved visual acuity after the operation. The uncorrected visual acuity reached 0.8 to 1.0 in 6 eyes and 0.4 to
0.6 + in the other 6, with a corrected visual acuity ranging from 0.6 to 1.0. The refractive status after operations was nearly
emmetropic (+0.75 to -1.00 D) in 6 eyes and myopic in the other 6 (-1.00 to -2.50 D). Conclusions Phacoemulsification and IOL
implantation is feasible in cataract patients with previous RK. Selecting the minimal K values for central corneal curvature and
calculation of the IOL power using the SRK T equation with a reservation of -1.00 to -2.00 D can better ensure the safety of the
procedure and avoid the occurrence of hyperopia >+3.00D.