Refractive Outcomes After Silicone Oil Removal and Intraocular Lens Implantation

Abstract

Refractive outcomes after silicone oil removal and secondary IOL implantation are fairly accurate, with most ending up slightly myopic. Measurement by PCI may be more accurate than biometry. The IOL power should be selected to yield a target refraction about 0.5 D to 1.25 D more hyperopic than desired, depending on the method used to measure it.

Accuracy of new-generation intraocular lens calculation formulas in eyes undergoing combined silicone oil removal and cataract surgery

“…Previous studies have reported the postoperative refractive status of SO-filled eyes with high heterogeneity (30% to 85% within ±1.00 D of target refraction) based on relatively small sample size (12 to 117 eyes). 6,19–26 In this study, 81.04% to 87.20% of SO-filled eyes displayed a PE within ±1.00 D, and 64.15% to 84.91% achieved a PE within ±1.00 D in long eyes. However, for normal eyes undergoing cataract surgery, 47.0% of eyes were within ±0.25 D of refractive target, 79.1% of eyes were within ±0.50 D, and 97.2% of eyes were within ±1.00 D. 27 The results of the study indicate that even the newly developed SS-OCT biometric instrument and new IOL calculation formulas are applied, the refractive outcomes of SO-filled eyes still lag far behind the normal eyes.…”

Refractive outcome of cataract surgery in eyes filled with silicone oil

“…Experienced examiners performed the biometry in an upright position using Alcon Ocuscan RxP (Alcon ® , Fort Worth, Texas, USA) according to the departmental standards. The IOL power was calculated based on axial length (AL) using the SRK/T, Hoffer, or Holladay formula, as recommended by Hoffer [9].The ultrasound velocity for the vitreous compartment was set as 986 m/s [10]. The target refraction was -0.5 D. Surgeries were conducted under topical anaesthesia and all patients received an acrylic onepiece IOL with a hydrophobic surface, the Acriva UDB 625 (VSY Biotechnologies, Amsterdam, Netherlands).…”