Simple hypermetropia, the most common form of hypermetropia, is caused by normal biological variations in the development of eyeball. Aetiologically, causes of hypermetropia can be classified as: * Axial: Axial hypermetropia occur when the axial length of eyeball is too short. About 1 mm decrease in axial length cause 3 diopters of hypermetropia. One condition that cause axial hypermetropia is nanophthalmos. * Curvatural: Curvatural hypermetropia occur when curvature of lens or cornea is flatter than normal. About 1 mm increase in radius of curvature results in 6 diopters of hypermetropia. Cornea is flatter in microcornea and cornea plana. * Index: Age related changes in refractive index (cortical sclerosis) can cause hypermetropia. Another cause of index hypermetropia is diabetis. Occasionally, mild hypermetropic shift may be seen in association with cortical or subcapsular cataract also. * Positional: Positional hypermetropia occur due to posterior dislocation of Lens or IOL. It may occur due to trauma. * Consecutive: Consecutive hypermetropia occur due to surgical over correction of myopia or surgical under correction in cataract surgery. * Functional: Functional hypermetropia results from paralysis of accommodation as seen in internal ophthalmoplegia, CN III palsy etc. * Absence of lens: Congenital or acquired aphakia cause high degree hypermetropia.<unk>  is often present from birth, but children have a very flexible eye lens, which helps to compensate. In rare instances hyperopia can be due to diabetes, and problems with the blood vessels in the retina.
Far-sightedness
Amblyopia
Tunnel vision
Optic neuritis
Blurred vision
Retinitis pigmentosa
Blurred Vision
Underwater vision