DR. BIRJEES HAKAK

Abstract

Vernal Keratoconjunctivitis is a seasonally recurring bilateral allergic condition of the cornea and conjunctiva. Chronic epithelial trauma by eye rubbing due to Itching has been postulated as an risk factor in the pathogenesis of keratoconus in VKC patients. The study was done to detect anterior corneal surface changes like astigmatism and keratoconus by topographic evaluation of cornea. The study was carried out on 212 patients between 5 to 20 years of age. Corneal topography was done in all the patients. Parameters like steep K, Sim K astigmatism, I-S difference and SRAX were analysed and keratoconus like topography noted.

Among the study eyes, Kmax> 47.2 D was seen in 10.1 %, Sim K astigmatism > 1.5D in 29%, I-S difference > 1.2 D in 19.6 % , SRAX > 21° in 20% and K max>47.2 D + Sim K astigmatism > 1.5 D i.e keratoconus like topography was seen in 7.5 % concluding higher incidence of astigmatism and keratoconus in VKC patients and early diagnosis by topography.