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Articles by Orhan BAYKAL
Total Records ( 2 ) for Orhan BAYKAL
  Ilknur AKYOL SALMAN , Murat ARSLANKURT , Osman DURSUN , Ahmet YAZICI and Orhan BAYKAL
  Aim: To investigate the progression of binocular vision of patients after cataract surgery in the early postoperative period.
Materials and methods: Eighty four cataract patients were evaluated at postoperative 1 and 3 months after phacoemulsification and posterior chamber monofocal lens implantation. For the evaluation of the grades of binocular vision, synoptophore was used. Stereoscopic acuity was measured with the Titmus Stereotest.
Results: Evaluation at postoperative 3 months was associated with a significantly higher proportion of patients with stereopsis (P = 0.004), better levels of stereoacuities (P < 0.001) than the evaluation at postoperative 1 month. Significantly higher visual acuities (P = 0.001) and lower interocular difference in refraction values (P = 0.023) were also noted at postoperative 3 months. The level of stereoscopic acuity was not significantly correlated with the level of visual acuity, interocular visual acuity difference, interocular difference in refraction, and the age of patients (P > 0.05). In patients without fusion, suppression was found in the operated eyes with favorable visual acuities, and even in some of those with higher visual acuities compared to the fellow eye.
Conclusion: During the early postoperative period of cataract patients, improvements in binocular vision were observed, which may be attributed to neural factors along with optical factors because of the cerebral basis for binocular vision.
  Ilknur AKYOL SALMAN , Ahmet KIZILTUNC and Orhan BAYKAL
  Aim: Glutathione peroxidase (GPx) is an important corneal defense enzyme for protecting against hydrogen peroxides and lipid peroxides. In the present study, corneal GPx activities after alkali burn of the cornea were evaluated in rabbits.
Materials and methods:
Corneal alkali burn was created in the right eye of 10 rabbits by applying a 6 mm round filter paper soaked in 1 N NaOH onto the central cornea for 60 s. The right eyes of 10 healthy rabbits served as controls. The corneal GPx activities were determined by the method of Paglia and Valentina, 10 days after the burn.
Results:
GPx activities were reduced significantly in alkali burned corneas compared to the normal controls (P < 0.05).
Conclusion:
The data suggest that decreased GPx activities predispose the cornea to injury from reactive oxygen radicals, besides the initial chemical damage of alkali burn.
 
 
 
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