How are LASIK prices determined?

LASIK eye surgery cost varies from provider to provider and depends on a several factors. The most common factors are the level of vision correction you require, the technology that will be used during the surgery, and the surgeon’s experience.

How is PTA calculated in LASIK?

PTA described for LASIK is calculated with the formula: PTA = (FT + AD)/CCT (FT = flap thickness, AD = ablation depth, and CCT = pre-operative central corneal thickness). Using this formula, the PTA was estimated for all eyes, using standard LASIK ablation depths and flap thicknesses (100 μm, 110 μm, and 120 μm).

How is LASIK measured?

During your LASIK evaluation, we will measure the thickness of the cornea with the corneal pachymetry test. The testing device is placed against the eye while the patient stares straight ahead and does not blink. The test employs the use of ultrasonic technology to measure corneal thickness.

How is LASIK correction determined?

Your eye doctor will evaluate which areas of your cornea need reshaping and determine the precise amount of tissue to remove from your cornea. Doctors generally use wavefront-guided technology to evaluate your eye in detail before LASIK surgery.

How is ablation depth calculated in LASIK?

The formula states that the depth of the ablation (in micrometres) per diopter of refractive change is equal to the square of the diameter of the optical ablation zone measured in millimeters, divided by three. For example, to change refraction by 4 diopters with an optical zone of 3 mm would require ablation of 12 μm.

How thick do corneas need to be for LASIK?

A good LASIK candidate will usually have a cornea that is 450-550 microns thick.

What is the minimum eye power for LASIK?

Limitations of Corneal Thickness Cornea should be adequately thick to perform LASIK. Too thin a cornea becomes a limiting factor. A normal Indian cornea has a central thickness of 530 microns or 0.53 mm. In this thickness, one can safely correct power of -8.0 by SBK (thin flap LASIK) or the Bladeless Femto LASIK.

What if my cornea is too thin for LASIK?

If your corneas are too thin, you cannot safely have the LASIK procedure. During LASIK, you must have enough corneal tissue, as it is reshaped during the procedure. If your corneas are too thin, getting LASIK could cause severe vision complications.

Can your cornea grow back after LASIK?

Instead of making the corneal flap, the surgeon removes the epithelium, the outermost layer of the cornea. After surgery, the epithelial layer will grow back.

How much thick should cornea be for LASIK?

How much cornea do you need for LASIK?

A good LASIK candidate will usually have a cornea that is 450-550 microns thick. This is only determined when you are at your LASIK consultation.

What is the highest power for LASIK?

It is therefore recommended that the ideal upper limit is -8.0, while the acceptable upper limit is -10.0. Beyond this number, LASIK should be avoided, and a better way would be to go in for an ICL implant. The upper limit of correction by LASIK for a plus number, i.e. hypermetropia is +5.0.