Myopia: Pathogenesis and clinical findings • Axial length of eye -> Long axial length of the eye may alter where light rays are focused • Abnormal refractive surfaces -> Increased curvature of one of the refractive structures of the eye (ex. cornea, lens) -> light convergence • Altered index of refraction -> Altered index of refraction of one or more ocular media of the eye (ex. cataract presence) -> Increased light convergence => Light rays entering the eye converge to a focal point in front of the retina => Myopia, also known as 'nearsightedness' • Near objects produce expanding divergent light rays -> Divergent light rays are focused further back in the eye as compared to the light rays of distant objects -> Retained near vision • Light rays from distant objects enter -> the eye somewhat straight -> Straight light rays are focused in front of the retina -> Blurry distant vision #Myopia #pathophysiology #ophthalmology
