ランドルト環を映し出す視力検査用チャートプロジェクター。本体全周に走るヘ凹面は、持ち運び時の指掛けとして機能しつつ、同メーカーのその他視力検査機器との共通イメージを生み出す。
A chart projector for visual acuity testing that projects Landolt's rings. The concave surface running around the entire circumference of the main body functions as a finger rest when carrying the projector, while at the same time creating a common image with other vision testing devices from the same manufacturer.
