Optometry Retinoscopy / Skiascopy Set High Quality!

This high quality set consist of 28 lenses, four wooden racks of seven lenses each. Minus and plus sphere powers include a range of .050D to 4.00D in half diopter steps, 4.00D to 8.00D in one diopter steps, and 8.00D to 12.00D in two diopter step. All lenses recessed in racks to prevent scratching and lodged in a red velvet lined woodcase with gold