Description The Cross Cylindrical opticalLens is a high-precision tool specially designed for optometrists and optical shops. It provides accurate vision test results, is convenient and practical to use, and is lightweight and easy to use and carry. This optometry tool cross cylindrical opticallens is an essential accessory for vision testing to meet your needs. Features -Color:silver -Material:Glass, metal -Size:10.00X3.70X0.30cm/3.93X1.45X0.12in -Note:25,50 -High-precision, cross-cylindrical optical lens, easy to use, convenient and practical, for vision testing. -Designed for professional use, suitable for use by optometrists and ophthalmologists. -Practical design and excellent performance ensure accurate vision test results. -Small size, portable and light, easy to carry, suitable for use in different places, and can bring a lot of convenience to optometry tools. -A must-have accessory for optical shops, it is simple to operate and easy to use to meet your needs.Package List1 x cross cylinder optical lens tool(50) 1 x cross cylinder optical lens tool(25)