12 S/SxAcute & severe altitudinal visual field defectPale retina in the area supplied by the affected arteryTreatmentMgt is directed toward determination of systemic etiologic factorsNo specific ocular therapy proven to improve visual prognosis
13 Central Retinal Vein Occlusion Non-Ischaemic (most common)moderate loss of visual acuityFA shows venous stasis but good retinal capillary perfusion50% - normal or near normal visual acuityChronic Cystoid macular edema – poor visual acuity
14 Ischaemic Severe loss of visual acuity Marked tortuosity & engorgement of retinal veinsRetinal hemorrhages, Cotton wool spotsSevere optic disc edema & hyperemiaVisual acuity is permanently impairedMonthly follow-up for 6 months(+) neovascularization – PRP treatmentTx of associated medicalcondition
15 Branch Retinal Vein Occlusion Sudden blurring of visionMetamorphopsia or relative visual field defectDilated & tortuous veins, hemorrhages, edema, cotton wool spotsComplications- chronic macular edema & neovascularizationWithin 6 mos 50% of eyesw/ collaterals will havebetter visual acuity
16 Glaucoma Increase in IOP, Optic Nerve changes, Visual Field defects Types:Congenital, Infantile, JuvenileOpen Angle (Primary, Secondary)Closed Angle (Primary, Secondary)
24 Types:Rhegmatogenous – liquefied vitreouspassing through a retinal break into thepotential space between the sensoryretina and the RPETractional –caused by proliferative mem-branes that contract & elevate the retinaExudative – caused by retinal or cho-roidal diseases in which leakage of fluidaccumulates beneath the sensory retina
25 S/Sx:light flashes, wavy or watery vision, veil or curtain obstructing vision, shower of floatersthat resemble spots, bugs or spider webs &sudden decrease of visionTreatmentSurgery : Scleral BucklingPneumatic retinopexyCryotherapy, Laser or DiathermyVitrectomy
26 Uveitis Inflammation of the uveal tract Types: Anterior Intermediate PosteriorPanuveitis
29 Legal BlindnessVisual acuity of 20/200 or worse in the better eye w/ corrective lenses (20/200 means that a person at 20 ft from an eye chart can see what a person w/ normal vision can see at 200 ft)ORVisual field restriction to 20 degrees diameter or less (tunnel vision) in the better eye.
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