Eye diseases in slit lamp examination, illustration. Slit lamp examination is a standard used to diagnose a range of eye disorders. The structures labelled here and associated disorders are: the iris (iritis), the cornea (keratitis), the choroid (choroiditis), the macula (macular degeneration and macular hole), the vitreous humour (vitreitis), the ciliary body (conjunctivitis), the pars plana (pars planitis), the sclera (scleritis and episcleritis), and the retina (retinitis, retinal detachment, retinal hole, retinal vasculitis, retinitis pigmentosa, and diabetic retinopathy). Also labelled are the lens and the optic nerve.