[Comparison of aberrations after photorefractive keratectomy using tissue saving and personalized techniques]

To compare the effects of standard tissue saving method and personalized techniques of photorefractive keratectomy [PRK] on aberration changes in fellow eyes. This randomized controlled trial was performed on patients who were referred to Isfahan Parsian Clinic during 2007. After a comprehensive ophthalmologic examination, PRK was randomly performed using tissue saving [TS] technique in one eye and personalized [P] technique in the fellow eye. Aberrometry was performed pre- and 6 months postoperatively. This study included 296 eyes of 148 [67 male and 81 female] patients with mean age of 29.1 +/- 7.0 years. The two groups had no significant difference in terms of laterality, pupil size and level of myopia preoperatively [P=0.65]. Uncorrected visual acuity was 20/25 or more in 88.9% of the TS group and 92.6% of the P group [P=0.83]. Mean refractive error 6 months postoperatively was -0.50 +/- 0.36 diopter [D] in the TS group and 0.31 +/- 0.43 D in the P group [P=0.95]. Mean root-mean-square [RMS] value was -0.41 +/- 0.17 preoperatively and 0.86 +/- 0.43 postoperatively in the group TS [P<0.01]. Corresponding figures were 0.47 +/- 0.39 and 0.77 +/- 0.43 in the P group [P<0.01]. The two groups did not differ regarding pre- and postoperative RMS. Postoperative aberrations may be increased with both tissues saving and personalized techniques of PRK with no significant difference between them in this regard

Comparing the effect of diclofenac and dexamethason after strabismus surgery

This study has been conducted to compare anti inflammatory effect of topical diclofenac with topical dexamethason following strabismus surgery. In this study 50 patients who had undergone strabismus surgery were evaluated. They were divided into two groups randomly. 25 patients received topical 0.1% diclofenac sodium [group A] and 25 patient received 0.1% dexamethason [group B] for 6 weeks. The baseline parameters were similar in both groups. At each visit ocular examinations was performed to record ocular discomfort, conjunctival inflammation, conjunctival repair, and intra ocular pressure [IOP]. Follow-up visits were 1, 2, 4, and 6 weeks, post operatively. There were no statistically significant difference in the rate of resolution of the inflammation, conj healing, and intra ocular pressure [IOP] except a non significant rise of intra ocular pressure [IOP] at the end of fourth postoperative week and statistically significant rise in intra ocular pressure [IOP] at 6th week post operative visit in group B. The results of this study suggest that diclofenac may be used as an alternative for dexamethason after strabismus surgery

Air bubble and viscoelastic agents in production of posterior capsular opacity and pigment deposition over the intraocular lens

In cataract surgery, viscoelastic agents form anterior chamber, complicating to posterior capsular opacity and pigment deposition over intraocular lens after lens implantation. We compared the rate of these complications for air bubble and viscoelastic agents. Patients with senile cataract and candidate for routine cataract extraction were studied. They were randomly divided into group A [n=62] and group B [n=66]. During operation and at the time of intraocular lens implantation, anterior chamber was formed by air bubble [in group A] and with viscoelastic agents [in group B]. All patients were followed for 3 to 6 months. The rate of posterior capsular opacity and pigment deposition over the intraocular lens were significantly higher in group B [40.9% vs. 21%] than group A [30.3% vs. 9.7%], respectively. Air bubble is a good substitution for viscoelastic agents in the formation of anterior chamber during cataract, either for decreasing complications or expensive materials