Earliest field defect in primary open angle glaucoma:
Ans. is 'b' i.e. Scotoma in Bjerrum's field Visual field defects in Glaucoma:Baring of blind spotScotoma in Bjerrum's fieldArcuate scotomaSeidel's scotomaRing or double arcuate scotoma.Roenne's central nasal step.Advanced field defect:At the last only a small island of central vision {tubular vision) and an accompanying temporal island are left.The temporal island is usually extinguished before the central island although occasionally this sequence is reversed.
Reidel's scotoma
Scotoma in Bjerrumns field
Arcuate scotoma
Nasal spur
Primary Open-Angle Glaucoma and Related Conditions