Sclera And Middle/inner Layer blood supply

Question 1

Episcleritis vs scleritis

Answer 1

Episcleritis -Reddish , vasoconstrictor test on using 2.5% phenylephrine reddness disappears—blanching, tenderness, idiopathic

Sclera proper p -scleritis violet purpleish, no blanching, no tenderness, commonly associated with systemic manifestation like rheumatoid arthritis

There are 3 layers of sclera
Episclera
Sclera proper
Lamina fusca

Question 2

Routes of ocular drug administration

Answer 2

Subconjunctival
Parabulbar
Topical ( eyedrops and eye ointment)
Intravitreal route
Intracameral injection - in anterior chamber
Peribulbar routes of local anaesthesia 
Retrobulbar

Question 3

Predominant collagen in sclera

Answer 3

Collagen type 1

Type 2 is present in vitreous body

Question 4

Staphyloma

Answer 4

Meaning bunch of grapes
Clinical condition characterised by ectasia of outer coats ( cornea sclera or both) with incarceration of the uveal tissue
Involves junction of uveal tissue with cornea
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Question 5

Macula is responsible for

Answer 5

Centre of macula is called fovea responsible for Central vision

Clinical cystoid macular edema(cme) loss of central vision

Question 6

Ora serrata

Answer 6

Anterior termination of retina
Junction between ciliary body and choroid
Site of intravitreal injection( retina wont be harmed)