Contrast Sensitivity Affection: A Comparative Study between Photorefractive Keratectomy and Small Incision Lenticule Extraction Pre and Postoperative | ||||
| The Egyptian Journal of Hospital Medicine | ||||
| Article 30, Volume 75, Issue 3, April 2019, Page 2531-2538 PDF (427.27 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejhm.2019.31081 | ||||
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| Authors | ||||
Abd Elmagid Mohammad Tag Eldain; Hosny Hassan Mohammad Aly; Mohammad Moustafa Abd Elhalem Diab 
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| Department of Ophthalmology, Faculty of Medicine, Al-Azhar University | ||||
| Abstract | ||||
| Background: the cornea is a transparent dome shaped structure at the front of the eye separated from the iris and pupil by the anterior chamber. It is one of the main refractive media of the eye. Refractive surgery includes several types such as Photorefractive Refractive Keratectomy (PRK) and Small incision lenticule extraction (SMILE). Objective: contrast sensitivity affection in comparative study between patients undergoing photorefractive keratectomy (PRK) or small incision lenticule extraction (SMILE) surgery. Patients and Methods: twenty cases of different patients’ ages; 18-30 years old with myopia from -0.5 D to - 9.00 D were included in this comparative study. Patient with corneal infection, trauma, opacities, operation, ocular disease or congenital eye disease were excluded from our study. All the selected patients were submitted to full ophthalmological examination (visual acuity, fundus examination, pantacam, and assess contrast sensitivity degree before operation and one month after refractive surgery. Measurement of contrast sensitivity was done by Function Acuity Contrast Test (FACT) before and one month after refractive surgery through several spatial frequencies (1.5, 3, 6, 12 and 18). Results: we found that contrast sensitivity was affected one month after refractive surgery in both groups but it is affected in group 1 after PRK more than group 2 that had femto SMILE. Conclusion: contrast sensitivity was affected in both patients who had PRK or Femto SMILE after one month from operation but it is more stable after Femto SMILE. | ||||
| Keywords | ||||
| cornea; PRK; SMILE; LASIK | ||||
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