S4OPTIK Perimeter Full Aperture Trial Lens Set with Wooden Case 

Minus Cylinder Only. Includes the following clearly marked lenses:

Spherical Lenses

• ±0.25 to ± 3.00D in 0.25D steps
• ± 3.50 to ± 7.00D in 0.50D steps
• ±8.00 to ±14.00 in 1.00D steps
• 16.00D

Minus Cylinder Lenses

• -0.25 to -1.00D in 0.25D steps
• -1.50 to -5.00D in 0.50D steps