Specifications of Lensmeter In-Side Reading mod. LYS-I

LYL-IA: without prism compensation
LYL-IB: with prism compensation

1、Ranges of Measurement: 0 to±25D
      Minimum: 0.125D graduation up 0 to±5D and 0.25D
                       graduations over±5D to±25D
2、Cylinder Axis Range:0~180°step 1°
3、Prismatic Power Range: 
      • prism diopter of Pattern A: 0-5 prism  diopters, 1△ graduations
      •Prism diopter of Pattern B (with prism compensation device): 0-20△ prism diopters, 1△ graduations
4、Prism Base Angle:0 ~180°Minimum scale value 1°
5、Eyepiece Adjustment: ±5D
6、Dimension of Objective Lens: φ16mm~φ80mm