Chowdhury, Partha Haradhan, Brinda Haren Shah, and Nripesh Tiwari. 2020. “All About High Plus and High Minus Spherical Lens and Aspheric Lens”. International Journal For Research In Health Sciences And Nursing 6 (5):19-23. https://doi.org/10.53555/hsn.v6i5.1331.