Author/Authors :
Hashemian, Mohammad Naser tehran university of medical sciences tums - Farabi Eye Hospital - Eye Research Center, تهران, ايران , AliZadeh, Mahdi tehran university of medical sciences tums - Farabi Eye Hospital - Eye Research Center, تهران, ايران , Hashemi, Hassan tehran university of medical sciences tums - Farabi Eye Hospital - Eye Research Center, تهران, ايران , Hashemi, Hassan Noor Eye Hospital - Noor Ophthalmology Research Center, ايران , Rahimi, Firoozeh tehran university of medical sciences tums - Farabi Eye Hospital - Eye Research Center, تهران, ايران
Abstract :
Purpose: To present the clinical features, biomechanical properties and management of a patient who developed unilateral corneal ectasia after photorefractive keratectomy (PRK)Case report: The patient was a 24-year-old man without any obvious preoperative risk factor for ectasia who underwent bilateral PRK. Four years after keratorefractive surgery, the patient presented with loss of visual acuity (VA) in his right eye. Pentacam findings were persistent with corneal ectasia and Ocular Response Analyzer measurements showed differences in signal shape between two eyes. A single piece intrastromal segment ring was implanted and ceased the progression of ectasia until now.Conclusion: Corneal ectasia after PRK is extremely rare and can occur without tangible risk factors. Differences between signal shapes in Ocular Response Analyzer and abnormal measurements may be useful in detecting high risk patients. Intacs implantation appeared to improve ecstatic progressive changes and patient s symptoms
Keywords :
Photorefractive Keratectomy , Corneal Ectasia , Ocular Response Analyzer , Intacs Implant
