-  Corona Target Type : Ocular Type External Reading System;

-  Vertex Power Range : ± 25D Step : 0.25D Step Up to± 10D 0.50D Step Beyond ± 10D;

-  Cylindrical Axis Scale : 0 to 180° (1° step);

-  Prismatic Power Range: 5 in the View field (1 step);

-  Target : Pins hole Corona;

-  Eyepiece Focusing : + 3D to -5D;

-  Diameter Of Lens Accommodated: 30 to 80mm;

-  Tilting Angle : 30° to 90°;

-  Light Source : AC 220V .