ABSTRACT Objective: To evaluate the effect of pterygium on different biometric intraocular lens calculation formulas. Methods: This is an interventionist, prospective, and non-randomized study. We included patients who underwent pterygium surgery and performed a biometric examination before and one month after surgery. We compared the mean variability between these measurements in each intraocular lens formula. We classified the patients according to the TAN staging system and evaluated the effect of pterygium magnitude on biometric variability. Results: We included 25 eyes […]

ABSTRACT Objective To evaluate intraocular lens power calculation and postoperative refractive errors in patients with high myopia undergoing cataract surgery, comparing predicted target refraction and actual postoperative refraction measured 30 days after surgery with SRK/T formula. Methods This retrospective analysis comprised 39 eyes of 31 patients undergoing cataract surgery through phacoemulsification with in-the-bag IOL implantation. Axial length was measured by partial coherence interferometry or immersion ultrasound biometry, with measurements greater than 26 mm and preoperative myopia greater than -6.0 D […]

Abstract This is a case report of a patient with concomitant Keratoconus (KC), Fuchs Endothelial Dystrophy (FED) and cataract with corneal decompensation submitted to Posterior Lamellar Corneal surgery (Descemet’s Membrane Endothelial Keratoplasty – DMEK) associated with phacoemulsification with intraocular lens (IOL) implantation. Corneal flattening and uncorrected visual acuity of 20/25 was observed in the postoperative period. We reasure the viability of DMEK as an alternative to Penetrating Keratoplasty (PK) in cases of associated DEF and KC associated. Changes in corneal […]

Abstract We present a case of 50-years-old, man with vision loss, dysmorphopsia and micropsy in the right eye with for 6 months. Ocular history included uncomplicated cataract surgery 10 years before. Best corrected visual acuity was 20/100 in the right eye and 20/20 in the left eye. Anterior segment OD demonstrated intra-ocular lens (IOL) haptic in the anterior chamber with iris perforation. Fundus examination revealed cystoid macular edema in right eye. Surgical approach with reposition of the IOL and triamcinolone […]

OBJECTIVE: Comparison of the visual performance between patients with Tecnis® MF ZM900, Acrysof® Restor® SN60D3, Acrysof® SN60AT and Acrysof® SN60WF intraocular lenses. METHODS: This prospective comparative study included 142 eyes of 71 patients in Sao Paulo University. The ophthalmologic evaluation performed included near, intermediate and distance corrected and uncorrected visual acuity, contrast sensitivity measurement and wavefront analysis. The minimum follow-up was 6 months. RESULTS: The mean age of patients was 60.7±6.6years in the Tecnis®MF, 63.1±4.4 years in-group Restor® 63.7±4.2 years […]

OBJECTIVE: To analyze refractive results in postoperative cataract surgery in eyes previously submitted to keratotomy using Haigis formula and data provided by IOL Master®optical biometer. METHODS: The measurements for IOL calculation were obtained through optical biometry by partial coherence interferometry (IOL Master®– Zeiss, 5.4 and 5.5 version) that provides us with the axial length, the central keratometry of 2.5mm, white-to-white diameter and anterior chamber anatomical depth. The formula chosen was Haigis. The surgical technique applied was with the scleral incision […]

This paper describes the intraoperative refraction for intraocular lens (IOL) power calculation. Report a case of a 67 year-old male patient reporting a progressive loss of visual acuity in the left eye (OS). Examination revealed best corrected visual acuity (BCVA) of 20/60 (-21,50 -4,00 X 170) related to adherence of silicone oil to the IOL optic. IOL exchange was proposed, however biometry was variable and doubtful. Intraoperative refraction confirmed the IOL power and the patient underwent uneventful IOL explantation and […]