Raghuwanshi, S., R. Kumar, and S. Raghuwanshi. “Psycho Physical Test in Normal Individual and Diabetic Patients With and Without Diabetic Retinopathy: Comparative Study”. International Journal of Medical Research and Review, Vol. 6, no. 2, Feb. 2018, pp. 93-101, doi:10.17511/ijmrr.2018.i02.05.