<prompt> Field defect in open angle glaucoma is best detected by?Humphrey field perimeterGoldman perimeterListers perimeterBjerrum screen  <response>: Diagnosis of glaucoma field defect is best done by Humphrey field perimeterGold standard. EARLIEST VISUAL FEILD DEFECT- PARA CENTRAL SCOTOMA Visual feild is defined as area if space visible to human eye without moving the eye fro central target. Rule of thumb:Earliest visual field defect in glaucoma always begin from close to center i.e Paracentral Bjerrum Generalized constriction. Extra edge: In Glaucoma, Temporal visual field is the last visual field to be affected. 