All of the following statements are true regarding Vitamin A deficiency except –
Clinical manifestations of Vit A Deficiency 

The most obvious symptoms of vitamin A deficiency are associated with requirement of this vitamin for maintenance of epithelial functions -


Intestine                                -->           Pathogenic attack causes diarrhea
Respiratory tract -->       Infections & bronchial obstruction
Urinary tract                         -->          UTI and caliculi
Skin                                        -->           Dry, scaly, hyperkeratotic patches
Squamous metaplasia of renal pelves, ureter, vaginal epithelium, and pancreatic & salivary ducts.


Poor growth because of


Above health problems in children
Vitamin A helps in bone growth ---> deficiency may retard growth


The most characteristic and specific sign of vitamin A deficiency are eye lesions. Which include night blindness, conjuctival xerosis, Bitot's spots, corneal xerosis and keratomalacia. The term xerophthalmia (dry eye) comprises all the ocular manifestations of vitamin A deficiency.
Other features are -

i)    Skin becomes toad like (phrynoderma). But it is due to associated deficiency of essential fatty acids.
ii) Vitamin A deficiency may rarely lead to hydrocephalus.
Growth retardation is common
Frequent infections can occur
Hydrocephalus is infrequent
Anterior segment of the eye is initially involved
Anterior segment of the eye is initially involved