This study tries to estimate the relationship between alignment of spectacle, decentration, spherical equivalent and type of lens with induced prism in spectacles. Design:-Descriptive cross sectional study. Materials and Methods:-Symptomatic cooperative ammetropes, using spectacles and between the age of 10 and 70 years were included in this study. Induced prism in spectacles were calculated by the Prentice formula. Results:-The study group included 29 ammetropic patients having asthenopic symptoms while using spectacles. 65.52% (n=19) were females. The mean age of this group was 48.33 years, with a SD of ± 17.45. This study showed a statistically significant positive correlation between spherical equivalent and induced prism and there is no significant correlation between decentration and induced prism. Conclusion:-Spherical equivalent is considered as an important factor affecting the induced prism rather than decentration and alignment problem.
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