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مقاله
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Abstract
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Title:
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Visual function, contrast sensitivity and stereopsis after photorefractive keratectomy for treatment of high astigmatism error
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Author(s):
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Hamid Khakshour, Amirhosein Vejdani, Ladan Saffarian
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Presentation Type:
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Oral
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Subject:
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Cornea and Anterior Segment
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Others:
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Presenting Author:
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Name:
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Hamid Khakshour
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Affiliation :(optional)
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Eye Research Center, Mashhad University of Medical Sciences
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E mail:
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hkhakshoor@Yahoo.com
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Phone:
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38418079
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Mobile:
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09151151208
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Purpose:
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To evaluate the visual outcomes of photorefractive keratectomy (PRK) for the correction of astigmatism error more than 3.00 diopters (D) and changes in contrast sensitivity measurements and stereopsis.
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Methods:
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In this prospective study, patients with astigmatism more than 3 D were included. In total, 451 eyes were included after exclusions. All treatments were performed by one surgeon. Outcome measures were postoperative refraction, visual acuity, spatial contrast sensitivity function (using CVS 1000 chart from 3 to 18 cycle/degree) and stereopsis. The Follow up period was up to 12 months. All eyes were targeted for emmetropia.
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Results:
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The Mean preoperative manifest sphere ranged from 5 to -7 D (Mean: -2.1, standard deviation [SD]: 2.7), and preoperative manifest cylinder ranged from -3.00 to -7 D (Mean: -4.2, SD: 0.92). Mean postoperative spherical equivalent at 12 months postoperatively was -0.4 (SD: 0.44) with significant change (p=0.001). The percentage of eyes achieving uncorrected distance visual acuity 20/20 or better was 88%. There was statistically significant change in contrast sensitivity at 3 and 6 cycle/degree at 12months (p=0.001). Stereopsis test showed no change after operation. No corneal haziness happened.
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Conclusion:
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In the current study, our results indicate that excimer laser corneal refractive surgery is efficient for correction of high astigmatism error without any serious complication.
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Attachment:
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