How LASIK eye surgery is carried out


This animation will show how your sight can
be corrected using LASIK. This procedure involves using a laser to change
the shape of your cornea, which is the clear covering over the front
of your eye. Click the navigation arrows below the animation
screen to play, pause, rewind or fast-forward the animation. This animation
contains sound. Short-sightedness (myopia) occurs when the
cornea is too curved, so light rays focus in front of the retina. Close objects may be clear, but distant objects
become blurred. LASIK can make the centre of the cornea flatter by removing more tissue from the centre than
from the edge. Long-sightedness (hyperopia) occurs when the
cornea is too flat, so light rays focus beyond the retina. Vision is blurred for both near and far objects. LASIK can make the centre of the cornea more
curved by removing more tissue from the edge than from the centre. Astigmatism occurs when the cornea is curved
irregularly, so light rays focus at several points instead of one. The eye is unable to focus evenly. LASIK surgery corrects the shape of the cornea. Before LASIK begins, local anaesthetic is
used to numb your eye. This can be given as drops or as an injection. A special frame is put over your eye to prevent
you from blinking. A highly precise instrument (called a microkeratome)
is used to make an ultra-thin flap in the cornea. The flap is opened so that the laser can be used to shape the
cornea underneath. The computer-controlled laser (called an excimer
laser) will remove precisely the right amount of corneal tissue. The flap is repositioned and seals to the
cornea within minutes. Stitches are not needed. Antibiotic eye drops will be put in your eye
as a precaution to prevent infection. After the procedure, your eye may be covered
with a protective dressing. This is the end of the animation. Click on the animation screen to watch it
again.

6 comments

  1. I have astigmatism in my left eye and I basically cannot see at all
    I can’t wait to get lasik and known what’s its like to see with 2 eyes

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