Shin-Nippon BR-7

Sphere power:

Range: +16.75 to -19.00 dioptres

Step: 0.25 diopters

Cylinder power:

Range: 0.00 to -6.00 diopters (0.00 to -8.00 diopters with additional lens of -2.00 diopters)

Step: 0.25 diopters

Cyl...