Definition Inflammation of the pars plana of the ciliary

body and the periphery of the choroid.

Etiology

Idiopathic

• 85%• Immunologic predisposition – HLA-DR2

Known cause• 15%• Tuberculosis• Syphilis• Sarcoidosis• Lyme disease

Clinical featuresSYMPTOMS Asymptomatic in many cases PAIN, PHOTOPHOBIA, REDNESS - ABSENT Floaters - insidious onseto Black spots which move with the movement of the eye and

become more apparent when viewed against a clear background

o Due to exudates of WBC in the vitreous cavity Blurring of vision

Anterior segment signs

• Low grade flare and cells• Few KPs ( keratic precipitates) – spill over anterior

uveitis• Complicated cataract – later stages

SIGNS

Posterior segment signsPATHOGNOMONIC OF PARS PLANITIS

• Vitreous cells • Anterior vitreous condensation• Snowball or cotton ball opacities or Ant’s eggs –

snowball like exudates near the ora serrata• Snow banking – HALLMARK – yellowish white exudates

(posterior hypopyon) & collagen bands over pars plana• Rarely severe vitreous opacification obscuring retina

and presenting as leucocoria

Complications

• Complicated cataract (42%)• Cystoid macular edema (28%)• Band keratopathy• 2 glaucoma• Vitreous hemorrhage• Tractional retinal detachment