Table of Contents
Which eye surgery is the safest?
All surgeries carry some risk of complications and side effects, but LASIK is generally considered a safe procedure with a low complication rate. In fact, LASIK is one of the safest elective surgical procedures available today, with a complication rate estimated to be less than 1\%.
What is the most popular eye surgery?
LASIK. This is a laser-assisted procedure that is used to correct vision problems and help patients see better without the need for glasses or contact lenses. It’s the most common procedure on this list. The word LASIK stands for Laser-Assisted in Situ Keratomileusis.
How many layers thick is the cornea?
The human corneal epithelium has five to seven cell layers and an accepted central thickness of approximately 50 to 52 μm. Bowman’s layer, a dense collagenous layer approximately 8 to 10 μm thickness lies between the epithelium and stroma.
What is the maximum correction for LASIK?
In general, excimer lasers that are FDA-approved for LASIK surgery performed in the United States can correct up to approximately -11.00 diopters (D) of nearsightedness, up to +5.00 D of farsightedness, and up to 5.00 D of astigmatism.
Which is better PRK or ICL?
In general, an ICL is better suited in patients requiring correction of moderate to severe myopia (-5 D to -20 D) because unlike LASIK/PRK, the ICL spares the cornea. Limited by corneal curvature, thickness and pupil size.
How thick is the cornea in MM?
The cornea is a transparent, avascular tissue; its diameter measures 11–12 mm horizontally and 10–11 mm vertically. Its refractive index is 1.376.
How many diopters is high myopia?
Most people consider high myopia to be about -10 diopters or greater. We have covered this topic extensively in the past. But what about patients who are -20 diopters or more?
What is the best IOL for mild myopia?
In this patient, here is what we determine using the Barrett and Ladas AI formulae: We have chosen the Alcon MA60MA three-piece acrylic IOL in a power of -3.0 diopters (minus power) for the right eye to give a post-op result of mild myopia of about -0.5 to -1.0 which should be excellent.
How much post-operative myopia is acceptable?
Our goal is to err on the side of residual myopia and in this regard, no matter the method you use for calculation, always aim for at least a little post-operative myopia. Taking a patient from -21.5 diopters to -2.0 diopters is a great success, but having this same patient end up at +2 diopters is not.
What about -20 diopters or more?
But what about patients who are -20 diopters or more? This patient has a long-standing refraction of -21.5 in the right eye and when we measure the axial length it registers as 36 mm. That is an ultra high level of myopia and cataract surgery can be life-changing for this patient, but it is also quite challenging.