vitamin a
You need vitamin A for healthy eyesight and skin.
Deficiency disease is night blindness.
The prognosis for correcting night blindness is excellent
Nyctalopia (night blindness) is one of the first signs of deficiency of Vitamin A. moreover, deficiency of this vitamin can also produce Xerophthalmia (a medical condition in which the eye fails to produce tears), keratomalacia (an eye disorder resulting when the cornea becomes totally opaque and occurs blindness), and complete blindness since Vitamin A has a major role in phototransduction.
It is unlikely that frequent spider bites are related to vitamin deficiency. It is more likely the person is sleeping where spiders are congregating at night.
You need vitamin A for healthy eyesight and skin.
The first sign of Vitamin A deficiency is night blindness. Severe Vitamin A deficiency can cause Xerophthalmia (dry eye in which the eyes cannot produce tears) and complete blindness.
Anaemia is a deficiency of iron, night blindness is a deficiency if vitamin A and rickets is a deficiency of vitamin D.
blindness
Deficiency disease is night blindness.
Deficiency disease is night blindness.
night blindness
night blindness
Deficiency disease of Vitamin A
if you lack vitamin a you get night blindness
defiency of vitamin a causes blindness.
night blindness is caused due to the deficiency of vitamin a