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First Author: J.Campos PORTUGAL
Co Author(s): A. Campos A. Neves S. Mendes D. Beselga L. Violante J. Castro Sousa
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To evaluate surgically induced astigmatism (SIA) when the clear corneal incision is done on the temporal meridian and variation of intraocular pressure (IOP) with cataract surgery.
Ophthalmology Department, Santo André Hospital, Leiria-Pombal Hospital Center, Portugal
A retrospective, unicentric study, included 91 eyes of a group of patients with a mean age of 83 years. All of them underwent phacoemulsification cataract surgery by the same surgeon through a 2.75 mm temporal corneal incision. Preoperative astigmatism and IOP were compared with data collected 1 month after surgery. Student T test was used to compare mean values.
Preoperative corneal astigmatism varied from 0.5 to 3.5 diopters with a mean of 1.21 ±0.74. SIA was -0.24 ±0.57 (p<0.001) [-2.00; +1.25]. Preoperative mean axis was 93.33ẃ ±31.83 and postoperative was 82.96ẃ ±36.68. Preoperative mean IOP was 15.47 ±4.44 and postoperative was 11.19 ±3.38, with a mean reduction of 4.28 mm Hg [-17.1; +6.3] after phacoemulsification cataract surgery (p<0.001). There were no statistically significant differences between gender, age or laterality (p>0.05).
Clear corneal incision on temporal meridian decreased mean corneal astigmatism (-0.24 diopters) [-2.00; +1.25]. There was a statistically significant reduction of IOP 1 month after uneventful phacoemulsification.