NUTRITIONAL DEFICIENCIES OF EYE
A chemical substance that constitutes food and is responsible for the functions of food and also protects the body from various disorders is known to be nutrients. There are mainly two types of nutrients Macronutrient that is protein, carbohydrates, fats & Micronutrients that is vitamins and minerals.
Vitamins are organic micronutrients, which protect cells and tissues from physical and chemical effect and also microbial agents. The human body needs 13 different vitamins, of these 4 are fat soluble (A, D, E and K) and 9 are water soluble (C and B-group). Water soluble are readily absorbed from the diet, and do not require transport proteins in the plasma.
OCULAR NUTRITIONAL DEFICIENCIES
- DEFICIENCY OF VITAMIN –A -An Ocular manifestation of vitamin A deficiency are referred to as xerophthalmia.
- DEFICIENCY OF VITAMIN- B-1 (THIAMINE) it can cause corneal anesthesia, conjuctival and corneal dystrophy and acute retro bulbar neuritis.
- DEFICIENCY OF VITAMIN-B2 (RIBOFLAVIN) it can produce photophobia and burning sensation in the eyes due to conjuctival irritation and vascularisation of the cornea.
- DEFICIENCY OF VITAMIN-C it may be associated with hemorrhages in the conjunctiva, lids, anterior chamber, retina, and orbit. It also delays wound healing.
- DEFICINECY OF VITAMIN-D it may be associated with zonular cataract, papilloedema and increase lacrimation.