Abstract
Purpose :
The purpose of this study was to evaluate refractive outcomes after anterior chamber intraocular lens (ACIOL) implantation.
Methods :
This was a single center, retrospective series of patients who underwent anterior chamber IOL implantation. Patients who underwent ACIOL implantation at the Flaum Eye Institute/Strong Memorial Hospital in the E-record system between 10/28/11 and 2/28/18 were identified using CPT codes. Clinic charts, operative reports, and pre-operative IOL calculations were reviewed. Post-surgical data was collected at the 1-month follow up. In patients with longer follow up periods, additional data was collected at 3, 6, and 12-month intervals. Pre-operative IOL targets and post-operative spherical equivalent refractive outcomes were collected and compared. The pre-operative IOL targets were identified based upon the IOL power calculation formula used and the power of the IOL implanted. Post-operative refractive outcomes were collected using the spherical equivalent of the last manifest refraction. Post-operative uncorrected Snellen visual acuity (VA) was also reviewed. The main study outcome was the prediction error, defined as the difference between the pre-operative refractive target and the post-operative refractive outcome.
Results :
Seventy-one patients who underwent anterior chamber IOL surgery were identified to meet inclusion criteria. Of these 71 subjects, 35 had a post-operative refraction in the medical records. Average postoperative spherical equivalent (SE) was -0.35 +/- 1.25 diopters (D). Average predicted error was 0.31 +/- 1.00 D. Of the 35 subjects, 13 (37%) had post-operative refractions that were within +/- 0.5 D of the pre-operative target refraction, and 24 (69%) were within +/- 1.0 D of the target. Three subjects (9%) had outcomes more than -1.00 D more myopic from the target post-operative refraction. Eight subjects (23%) had outcomes over +1.00D more hyperopic than the pre-operative target refraction. 57 subjects had post-operative uncorrected VA recorded, and of these, 11 were 20/40 or better.
Conclusions :
In the current series, 13 subjects (37%) had a more myopic refractive outcome than anticipated. Twenty-two subjects (63%) had a more hyperopic result than the target pre-operative refraction. Thirteen subjects (37%) had a postoperative SE refraction within 0.5 D of the target, and 24 (69%) were within 1 D of the target refraction.
This is a 2020 ARVO Annual Meeting abstract.