MCC of conjunctival scarring?
MCC of conjunctivitis?
Raised yellow subepithelail connective tissue in the conjunctivia due to sun exposure are called?
Pterygium and Pingueceula are both caused by what?
Abnormal connective tissue located on the nasal conjuctiva is called?
Trachoma is characterized by what?
Inflammatory infiltrate with follicles and fibrosis of the conjuctiva leading to scarring
Fibrovascular tissue growth on the cornea in trachoma is called what?
Pannus---just like in Rheumatoid arthritis
What is the difference between the carcinoma in situ and squamous cell carcinoma of the conjunctiva?
carcinoma in site is not invasive
sqamous cell carcinoma is invasive
Copper in wilson's disease deposits where?
inflammation of the cornea
Cause of keratitis?
Keratomalacia or corneal ulceration is due to what deficiency?
What vitamin is used for Measles?
Vitamin A is used for what/
differentiation into specialized tissus--pancreatic cells, mucus-secreting cells and epithelium
Closed angle glaucoma is caused by what?
closure of the iris and lens corner preventing the aqous humor drainage from the posterior chamber to the anterior chamber
Open angle or closed angle are an emergency?
closed angle and its painful
What is the uvea?
Choroid layer + iris+ ciliary body
What are the layers of the eye going from outside in?
inflammation of either
injury to one eye releases antigens which enter lymphatics of conjunctiva which stimulate immune system attack the other other
What kind of immune rxn is seen in uveitis?
What causes uveitis
Causes of uveitis?
bacterial--TB, leprody, syphilis
viral--cmv, herpes zoster
What helminth causes blindness via uveitis?
Uveal malnomas occur where in the eye?
Most common intraocular tumor?
opacification of lens due to
Posterior sub-capsular cataract is due to?
liquification of lens
Retinopathy of prematurity is due to what?
high oxygen given in neonatal respiratory distress syndrome
What are the pre-proliferative pathologies of the eye in DM?
hard exudates--protein leakage
basement membrane thickening
Copper wire appearance of retinal vessels is seen in what?
Retinitis pigmentosa is caused by what?
mutation in peripherin and opsin
loss of rods--night blindness
loss of cones--loss of high acuity vision
3 types of retinal detachment?
non-rhegmatogenous detachment-protein rich exudate separates the retina from the retinal pigment epithelium
vitrous detachemnt--posterior hyalonoid humor separates from the internal limiting membrane
rhegmatogenous detachment---vitrous humor pulls on the retina and liquified vitreous humor separates the retina from the retinal pigment epithelium
Age related macular degeneration?
loss of central vision and hemorrhages in the macula
Dry ARMD vs wet?
dry--due to fat deposits..slow decrease in vision
wet--fast bc of neovascularization