Contact Lens Evaluations and Options
New advancements in Daily wear technology can even correct for Astigmatism and some even come in a bifocal contact lens type.
Because there are different curves in the cornea, there are also different prescription powers in different places. Now with glasses, that is not a problem because the glasses are always sitting in the same place. In contacts however, the contact lens has a tendency to spin and turn as you blink. This lens rotation causes the astigmatism prescription to change, making the vision blurry as the lens moves and turns.
Therefore, an astigmatism lens has to sit at the exact same place on the eye throughout the entire day in order to work properly.
What the brain receives is a garbled, distorted mess, but the supercomputer sitting between our ears is able to filter out the distances that it’s not interested in.
This results in you being able to read a menu one moment and then check the score of a ball game on a television the next. This process sounds quite convoluted but it actually works surprisingly well!