Blocks for Plastic Lenses

Here is an assortment of surface blocks used to block plastic lenses.

43mm Cribbing Blocks
These cribbing blocks are 43mm in diameter and are used for securely blocking plastic lenses with a variety of base curves.

55mm Blocks
These blocks are 55mm in diameter and are used for securely blocking plastic lenses with a variety of base curves.

63mm Blocks
These blocks are 63mm in diameter and are used for securely blocking plastic lenses with a base curve of 6.25.

68mm Blocks