LASIK

 

Refractive error is one of the most common disabilities in our lives. The image is not focussed sharply on the retina, resulting in a blurred image. This can be corrected with corrective glasses or contact lenses. These extra additions to our body can sometimes cripple our life-style, whereas LASIK (Laser In Situ Keratomileusis) can elimiate our dependance on glasses or contact lenses.

Types of Refractive Errors

  1. Myopia (nearsigntedness), when only objects at a near distance are visible clearly.

  2. Hypermetropia (farsightedness), when only distant objects are visible clearly.

  3. Astigmatism: image is blurred for near and distant objects. Occurs when the light rays are focussed at multiple points due to the cornea being more curved in one direction than in the other.

What is LASIK?

It is the most recent advancement in the field of refractive surgery. LASIK is used to reshape the cornea, which is the most powerful lens of the eye. It uses an excimer laser, which is a revolutionary new tool, which uses a cool beam of light to reshape the cornea and improve vision.

The superficial layer of the cornea is raised, laser is applied to the underlying bed, and the superficial layer is then replaced.

Who are suitable candidates for LASIK?

Patient must be at-least 18 years of age.

He/she should have stable refraction for the past 6-12 months.

No pre-existing eye problems such as cataract, glaucoma, infections, dry eyes or any other conditions that would delay post-operative healing.

Pregnant and nursing mothers cannot have surgery immediately. They must wait till the hormones have returned to normal levels.

Patients must have realistic expectations, ie. the surgery is only designed to reduce their dependence on glasses or contact lenses. Surgery does not always create 6/6 (20/20) vision, although most cases do achieve this goal.

Is LASIK safe?

LASIK is approved by the FDA. There are risks associated with any surgical procedure, but LASIK has many safeguards in place and hence there is very little room for error.

Is it painful?

There is no pain at all during the procedure. There is, however, some ocular discomfort (gritty sensation) and watering during the first 24 hours after surgery, which gradually subsides by the 2nd or 3rd day.

Will there be satisfactory vision after surgery?

Yes, in majority of patients (95%) the vision improves dramatically after surgery and dependence on glasses is eliminated. Some patients will need reading glasses or a thin pair of glasses.

Are any tests required prior to surgery?

Yes, pre-operative corneal and retinal evaluation needs to be carrried out prior to treatment. If the patient is wearing contact lenses, they have to be discontinued 10 days prior to examination and treatment.

When can the patient get back to work?

Usually within a week. However, swimming, water sports and contact sports can be resumed only after 3 months. Vision improves withing 1-3 days. However, stability of vision is achieved only in 1-3 months time.

Side Effects

Vision may fluctuate for a few days after LASIK. Glare, haloes and starbursts may be seen, especially around lights at night, which usually disappears with time. Some patients experience dryness of eyes, which can be alleviated with drops.

Advantages

 

Dr. Prashant Aroskar
Ophthalmologist
Laksh-Deep Hospital