| Are there other non-surgical means of improving vision? |
| A procedure called orthokeratology has been available for many years. In it, a series of progressively flatter gas permeable hard contact lenses are used to flatten the cornea. When the cornea has reached its desired correction, a retainer contact must be worn for several hours per day to prevent the cornea from returning to its original shape. Therefore, it does not cause a permanent correction. |
