Kamra inlay for near vision / presbyopia treatment - A State of Sight #109

The Kamra inlay from AcuFocus was recently FDA approved to improve the near vision in patients with presbyopia (age related focus dysfunction). This is exciting new technology!

Welcome to A State of Sight, I’m Isaac Porter, and this is your update in ophthalmology and eye care from Raleigh. Today, I would like to explain the Kamra corneal inlay because it was recently FDA approved for patients ages 45 - 60 to help improve their near vision.
This inlay is a small disk that is implanted inside the cornea in order to give up-close vision in addition to distance vision in patients who have age related focus dysfunction or trouble seeing up close as they get older. The medical term for this is presbyopia. Besides glasses and contact lenses, other presbyopia treatments now available are monovision with LASIK (where one eye is corrected for distance and the other eye for near vision), or multifocal lens implants that are placed at the time of cataract surgery.
The Kamra inlay looks like a small disc that is placed in the cornea. In the center of the disc is an opening that is 1.6 mm. My wife enjoys photography and she could explain better than I can how this works, but basically when there is a small visual opening, the depth of field is increased. This takes advantage of small aperture optics and gives a larger range where images appear in focus when you are looking through a very small opening.
This implant is placed in the non-dominant eye to help improve the near vision in that eye. The dominant eye is left untouched to focus more for distance vision. This can help people be able to read and see up close without glasses. They have to have a very small prescription initially in order to qualify for it because it doesn’t correct nearsightedness or farsightedness.
The eye surgery needed to place the Kamra inlay uses the same femtosecond laser that is used to create the flap with LASIK. Instead of a flap, the laser creates a pocket inside the cornea. This inlay is placed towards the middle, closer to the front of the cornea. With this, if necessary, it could be removed down the road, making it a reversible procedure.  

This is new technology, so we are probably going to hear more about it as time goes by. If you have any questions, please post and we will be happy to answer them. Hopefully we will see you again soon, next time on A State of Sight.