A femtosecond laser creates a thin corneal flap which is then gently moved, like a page of a book. The resulting exposed cornea is then reshaped with a second laser (called an excimer) resulting in perfectly corrected vision within seconds. The flap is then gently replaced back to its original location and acts as a natural bandage. This is the major advantage of lasik over older types of refractive surgery (such as PRK) because the “bandage effect” of the flap allows for rapid healing (reduced pain and rapid visual recovery).
Until recently, LASIK laser technology allowed for the correction of only distance vision, meaning patients over 45 years of age still required glasses to read. Today, the surgeons at Lumea are proud to be one of the very few centres in Canada to have mastered the use of Presbyond LASIK to correct both distance AND reading vision in suitable patients over the age of 45. In Presbyond LASIK, a naturally occurring visual phenomenon called Spherical Aberration (SA) is optimized on the cornea to allow for the ideal blend of depth of focus and visual quality.
Side effects of Presbyond LASIK are identical to regular LASIK and include temporary dry eyes, and foreign body sensation. Patients may experience night time glare or halo for a few days, which quickly resolves with normal healing. Complications of Presbyond LASIK are extremely rare and are ALL treatable. These include infection, swelling or inflammation under the flap (diffuse lamellar keratitis).
Ideal candidates for Presbyond LASIK:
- Are between 45 and 60
- Have myopia (near-sightedness) up to -9.0D
- Have hyperopia (far-sightedness) up to +2.0D
- Have astigmatism up to 5.0D
- Have suitable corneal thickness
- Surgery Length
- 15 minutes
- Local with oral sedation
- Side Effects
- Dry eyes
- Temporary night glare
- Temporary swelling or flap inflammation
- Flap misalignment
- Discomfort 6‑12 hours
- Vision 1‑2 days
- Exercise 5‑7 days
- Make up 7‑14 days
- Final Visual Outcome
- 1‑2 weeks
- Dry eyes typically resolve in 4‑8 weeks