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Colour Vision

What is colour vision?

Colour Vision Colour vision is the ability to detect various wavelengths of light waves and to distinguish between these different wavelengths and their corresponding colours.

Simple Allergic Conjunctivitis

It is characterized by itching,hyperamia,and mild papillary response. EtiologyIt occurs due to subsiquent mast cell…

Font Size and Viewing Distance of Handheld Smart Phones

Abstract Purpose.  The use of handheld smart phones for written communication is becoming ubiquitous in modern society. The relatively small screens found in these devices