PURPOSE To investigate the effect of pterygium surgery on corneal topography and contrast sensitivity. PATIENT AND METHODS The IRB approved this prospective, nonrandomized, self-controlled study. Computerized videokeratography (Orbscan II) was performed in 36 patients with primary pterygia, both before and 1 month after pterygium excision with limbal-conjunctival autografting. The topographic...

Purpose. To evaluate changes in anterior, posterior, and total corneal astigmatism in patients after Descemet membrane endothelial keratoplasty (DMEK). Methods. We retrospectively included 29 eyes of 23 patients (age 67.6 ± 9.8 years, 13 female, 10 male) after DMEK surgery. The magnitude and axis orientation of anterior, posterior, and total corneal astigmatism before and after DMEK were determ...

PURPOSE To evaluate surgically induced astigmatism (SIA) after an intravitreal ranibizumab (IVR) injection. METHODS Fifty eight eyes of 58 patients who underwent IVR injection due to age-related macular degeneration (wet form) or macular edema were included in this study. Patients' pre- and postoperative detailed ophthalmologic examinations were done and topographic keratometric values (K1, K...

PURPOSE To compare the effectiveness of toric foldable iris-fixated phakic intraocular lens (pIOL) implantation and non-toric foldable iris-fixated pIOL implantation with limbal relaxing incisions (LRIs) for correcting moderate-to-high astigmatism in myopic eyes. MATERIALS AND METHODS The medical records of 146 patients (195 eyes) with myopic astigmatism who underwent toric foldable iris-fixa...

Background: The toric IPCL is posterior phakic intraocular lens used for correction of moderate to high myopia with astigmatism, but after the implantation, there were changes in parameters anterior chamber (AC). Purpose: purpose this study assess AC and vault patients astigmatism by Pentacam. Patients Methods: In a prospective interventional case series, 30 eyes treated implantation. Pentacam ...

BACKGROUND To use a Monte Carlo simulation to predict postoperative results with the AcrySof Toric lens, evaluating the likelihood of over- or under-correction using various toric lens selection criteria. METHODS Keratometric data were obtained from a large patient population with preoperative corneal astigmatism <= 2.50D (2,000 eyes). The probability distributions for toric marking accuracy,...

BACKGROUND To evaluate and compare the astigmatism prediction errors taken with the Pentacam measurements, Baylor nomogram, and Barrett formula for toric intraocular lens (IOL) implantation. METHODS Phacoemulsification with toric Precizon IOL implantation was performed in 41 eyes with corneal astigmatism (range, 1 to 5 diopters (D)) determined by IOLMaster and SimK on Pentacam. Preoperative c...

RATIONALE Penetrating astigmatic keratotomy (penetrating AK) is a well-known method to correct corneal astigmatism but rarely be performed nowadays. This article reevaluated the clinical effectiveness and confounding factors of penetrating AK. PATIENT CONCERNS Penetrating AK has been introduced to serve as one alternative operation for astigmatism correction, and is thought to have the potent...

Aim: To determine the amount and type of surgically induced astigmatism (SIA),in superior and superotemparal sclera incisicion in small incision cataract surgery. Methods: A prospective randomized comparative clinical study. Study was done on a total number of 100 patients aged 40y and above with senile cataract. 50 cases were randomly assigned superior sclera group and other 50 cases were allo...