There is still much to learn about how to interpret genetic testing for keratoconus. A very low score can be quite reassuring. A high score (85, for example) certainly points to the need for more ...

What Happens During a C4 Test? C4 tests are done using a simple blood draw that is usually taken from a vein either on the inside of your elbow or on the back of your hand. You don’t need to do ...