Dr. SASIKALA ELIZBETH ANILKUMAR

Dr. KALPANA NARENDRAN

Abstract

Aim: To study the success of prism in terms of Diplopia resolution score & associated factors. Method: Descriptive, retrospective study. Duration 3 yrs. Results: 54 patients were evaluated for diplopia, 31were included. Mean follow up 15 months, mean age 37 yrs, mean duration of diplopia for 11 month. ET, XT, HT were seen in 39%, 51%, 19.4% respectively. 29% given ground glass and 71% Fresnel prism. 22.6% had decompen-tropia. 25.8% post trauma and buckle Sx. Mean prism power13.3 PD. 96.8% continued usage of prism. 87% had complete resolution of diplopia. High success rate seen for decompen-tropia, 6th, 4th N palsy. 3.2% opted for squint sx. Horizontal and oblique as fresnel had complete resolution of diplopia(p=0.028) Other analysis on factors(etiology,type of deviation)were not significant. Though difficult, oblique fresnel should be considered for combined deviation. Conclusion: Our study showed fresnel prism to be effective in alleviating diplopia over a varied range of etiologies