Professional Independent Optometry

Laser Eye Surgery

Eyes On Optometrists has a long association with laser refractive surgery. For many years we worked closely with a prominent ophthalmologist providing pre and post operative care for his patients at our Queen Street store. Sue Callahan, our principle optometrist at Docklands previously managed a refractive surgery centre in Canada.

Laser Eyes Surgery is another way of correcting short-sightedness, long-sightedness and astigmatism (refractive error). While glasses and contact lenses are still the most common option for correcting vision, laser surgery has become an increasingly popular option. The visual outcomes are excellent. Many people don't realize that laser surgery is not a cure, only a correction. It is possible that years later your vision may again deteriorate. It is important to establish that your vision is stable, so that you can enjoy many years of glasses free vision.

How does laser surgery work?

Laser vision correction involves reshaping the surface of the cornea to change the power of the eye. This is achieved using a cool excimer laser. The photons from the laser break the intermolecular bonds in the tissue allowing the precise remove of very fine layers of tissue. The photons are released onto the cornea in a series of pulses. The beam is 'cold' and thus no structures in the eye are heated. The number of pulses depends on the level of and type of prescription that is being corrected and is predetermined before the operation. The most common surgery is called LASIK.

image of eye before lasik
Two laser treatment
It may surprise you to know that LASIK commonly involves using two separate lasers to treat the eye. The following is a step by step summary of the procedure.
creating flap in lasik proceedure
Creating a cornea flap
The initial step involves creating a very thin flap that is then lifted back allowing the surgeon to reshape the cornea. Using the intralase laser, small air bubbles are created in the corneal surface allowing the surgeon to gently lift the flap away from the eye without damaging the surface of the cornea.
image of lasik procedure, reshaping the cornea.
Reshaping the eye
Using a second laser, the surface of the cornea is then reshaped to correct your vision. The process of reshaping varies depending on your refractive error. In the case of a short sighted person, the cornea is flattened.
replacing the flap following lasik
Replacing the flap
Once the cornea has been reshaped, the flap is carefully replaced on the eye.
cornea following lasik
Vision without glasses or contact lenses
The cornea has now been reshaped and within a very short time (usually a day) you will be able to see clearly without the need for glasses or contact lenses.
Pre and Post Operative Consultations

Before commencing treatment a series of assessments need to be performed to ensure the best visual outcome.

Pre-Operative assessment

Before you can consider laser surgery as an option for vision correction you will need a comprehensive eye examination. Measurements will be taken of your prescription, the shape of your eye and your corneal thickness to see if you are suitable for surgery. They also assess your ocular health for any unforeseen problems. 90% of patients achieve complete independence from glasses, while some may be left with a very slight correction requiring glasses on a part-time basis.

Post-Operative consultations

After surgery your eyes will require periodic assessments over a twelve month period. At Eyes on we have optometrists that are experienced in the post operative assessment of patients. The eyes are usually checked one day after surgery, and then after one week, one month, 3 months, 6 months and then one year. In a small number of cases, as the cornea heals there may be some regression. This is more common for the stronger corrections and anyone with regression will be required to attend the laser clinic again for further treatment.

For further information follow the link to all about vision: LASIK