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Raindrop & Kamra Inlays
Corneal inlays are tiny lenses or pinholes that are placed in the cornea to improve issues with presbyopia (where the eyes gradually lose the ability to see things clearly up close as we age). Improving up-close vision and reducing the need for reading glasses.
This procedure is indicated for patients between the ages of 40 and 65 years old with only the non-dominant eye being performed. Thus allowing for great distance vision with depth perception, while improving your near vision. These surgeries are combined with LASIK surgery, allowing our surgeons to also correct nearsightedness, farsightedness and/or astigmatism that you may have at the same time. (This is considered an “off-label” use of the procedure though). There are 2 corneal inlay procedures that have been FDA approved, the Karma Inlay and Raindrop Inlay.
The Kamra inlay is a small and thin pinhole, measuring 3.8 mm in diameter by 6 microns thick. To put that in perspective that is less than one-tenth the thickness of an average human hair, or about the diameter of a single red blood cell. The inlay has an opaque outer ring with a small 1.6 mm central opening. When implanted in the cornea, the Kamra inlay is positioned so its central opening is directly in front of the pupil of the eye. This creates a “pinhole camera effect,” which expands the range of clear vision to bring near objects into sharper focus while maintaining clear distance vision.
Raindrop is a small transparent disc made of hydrogel. With a water content of 77% and refractive index of 1.37, it has the optical characteristics similar to a human cornea. Measuring 2 mm in diameter by 32 microns in thickness the Raindrop works by reshaping the shape of the cornea due to its thicker profile. Causing distance paracentral light rays travel through the thinner portion of the inlay and the near vision light rays to travel through the thicker central portion of the inlay. Thus expanding your range of vision, bringing near objects into sharper focus while maintaining clear distance vision.
How long does Inlay surgery take?
The surgery generally takes less than 15 minutes to perform. It is performed in our on-site surgery center in Fraser.
Medications after Inlay surgery?
Patients are generally on steroid, antibiotic and artificial tear eye drops any where from couple weeks to a couple months. Our doctors will go over your post-operative regimen at the time on your inlay consultation.
When can go back to normal activities?
Most patients go back to work the very next day and can resume normal activities with 24 to 48 hours. Light workouts and jogging can be resumed during that time, strenuous gym activities and swimming should be delayed 2 weeks to resume.
Can the Inlay be removed?
Yes the inlays can be removed at any time.
Can I have cataract surgery after Inlay surgery?
As we get older, cataract surgery is generally needed for most patients over the of 65 years old. The inlay placed may distort your pre-operative cataract analyzers and scanners, as such we recommended obtaining cataract biometry readings prior to inlay surgery for your records.
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