LASIK LASER EYE SURGERY

LASIK
EYE SURGERY
PICTURES AND DESCRIPTON

On the right, we show an illustration of a normal eye before any type of refractive procedure. The dark purple layer on the outer part of the cornea is called the epithelium. This protective outer layer is left intact with LASIK but is always removed when performing PRK.

Normal eye

Before the LASIK eye surgery, numbing (anaesthetic) drops are instilled.
The LASIK procedure is performed while you lie on your back on the laser table
.


A speculum will be placed on your eye to hold your eyelid open. This will prevent you from blinking, and this is considered the most uncomfortable part of the LASIK procedure.

LASIK procedure - speculum

A device is used to make reference marks which the doctor uses for correctly aligning the flap after the LASIK laser procedure has been performed.

Lasik procedure alignment marks

This is a cross section view of the procedure performed by the microkeratome. The result is a uniform flap with a hinge, that the doctor lifts to expose the inner layers of the cornea.

cross section of flap made with microkeratome

The device on the right is a suction plate which will provide a base for the microkeratome.

When the suction is applied, your eye is held stationary and you will feel some pressure which results in a temporary black out of vision in the eye.

suction plate and microkeratome on eye

LASIK - making the flap

With the eye held firmly in place, the second part of the device first flattens the cornea. This enables the special microkeratome blade to create a flap of uniform thickness.

    LASIK - eye with flap

LASIK eye folding back flap

The doctor then lifts the flap back to expose the inner layer of the cornea.


With the flap folded back, the refractive correction is made on the inner layer of the cornea.

Cross section of flap

At this point the doctor will ensure that your eye is perfectly aligned and focused.

The LASIK procedure in these photos was performed on a MEL 70. This laser uses a metal tracking ring which works in conjunction with an infrared tracking device. This is used for tracking any slight movement of the eye and ensures that the laser remains positioned on the area intended for treatment.


LASIK tracker ring on eye

In the photo to the left, the tracking ring has been placed on the eye and the small red light in the middle of the pupil indicates that the tracking device is locked in position. Therefore, the laser will follow any slight movement of the eye.

The two outer red lights are used to gauge the correct focus for the laser.

A sponge is placed over top of the flap. This ensures that the inner surface of the flap is unaffected by the laser and that laser treatment is confined to the intended area.

The laser then contours the exposed layer of cornea according to the correction and widest possible optical zone.

lasik - sponge over flap


lasik - removing the eye tracker ring lasik - removing the eye tracker ring lasik - removing the eye tracker ring

When the LASIK treatment is complete, the doctor removes the tracker ring.


The doctors washes the treated surface of the eye to ensure that any debris is flushed.lasik - washing the surface of the eye

lasik - floating the flap back into position
The flap is then floated back into it's original position.

 

lasik - floating the flap back into position

The doctor will wash under the flap to remove any bubbles or remaining bits of debris.

lasik - floating the flap back into position

Care must be taken by the doctor to ensure an excellent fit when repositioning the flap.

The flap is returned to its original smooth position and the LASIK vision correction is complete.

lasik - sponging the flap smooth lasik - sponging the flap smooth

lasik - sponging the flap smooth
lasik - eye after procedure is complete

The eye has a natural suction facility that keeps the flap firmly in place.

Because very little of the epithelium has been disturbed, most patients report only a few hours of discomfort after having LASIK vision correction.

Follow your doctor's Post Operative directions exactly.


E-mail this page to a friend   
Enter your friend's e-mail address:  
PLEASE NAVIGATE THIS SITE BY USING THE LINKS PROVIDED ON OUR  SITE MENU ON THE HOME PAGE
PRK and LASIK Today - www.lasik1.com Worldwide Directory What is LASIK?  What's New
PRK and LASIK Today - www.prk.com
Price/Payment Options/Patient Financing FAQs
Free Information Medical Section Glossary

For more information contact:
Dr. Murray McFadden
(BSc, MD, FRCS(C), Diplomate of the
American Board of Ophthalmology)
© Copyright 1996-2005 Murray McFadden MD, Inc.

Email: m2@lasik1.com
Telephone: (604) 530-3332
Fax: (604) 535-6258
SnailMail: 20434 64th Avenue, Unit #201,
Langley, BC Canada V2Y 1N4


This page last updated on September 30, 2004.
Web Page Programmer Turnaround Type and Graphics

Disclaimer
Murray McFadden MD., Inc. provides Online information by way of Internet for communication and review purposes only. Murray McFadden MD., Inc. does not have editorial control over and has not participated in the development of the materials provided here, other than those materials copyrighted in favour of Murray McFadden MD., Inc. himself, nor has Murray McFadden MD., Inc. exerted any control or participated in the development of other Internet sites which may contain informational materials of a similar nature to those found here. Murray McFadden MD., Inc. disclaims any and all liability for any injury or other damages which may result from the communication or review of information contained here.

Materials produced here are not intended to provide medical information. Rather, the materials are presented for informational purposes only. None of the materials presented may be relied upon by any person for any medical, diagnostic or treatment reasons whatsoever. None of the materials presented here may be relied upon by any person for purpose other than informational purposes without the express written consent of Dr. Murray McFadden or the person indicated as the owner of the relevant materials. Dr. Murray McFadden disclaims any liability for any injury or other damages resulting from the review or use of the information obtained here. Dr. Murray McFadden asks that any person reviewing the materials presented here obtain specific medical advice and answers to specific medical questions, by a qualified eye doctor.