What is dry eye?
Dry eye is not a disease entity but a symptom complex occurring as a deficiency or abnormalities of the tear film.
What are the causes of dry eye?
1. Aqueous deficiency dry eye (keratoconjunctivitis sicca - KCS)
Congenital alacrimia
Sjogren's syndrome
Riley-Day syndrome
Idiopathic hyposecretion
2. Mucin deficiency dry eye
Hypovitaminosis A (xerophthalmia)
Stevens-Johnson syndrome
Trachoma
Chemical burns
3. Lipid abnormalities
Chronic blepharitis
Chronic meibomitis
4. Impaired eyelid function
Bell's palsy
Exposure keratitis
Ectropion
5. Epitheliopathies of corneal surface.
Name the important tear film tests performed to diagnose the dry eye. Tear film break-up-time (BUT)
Schirmer - 1 test
Rose bengal staining.
OPTOMETRY-SHARP VISION
Optometrist