"Laser Blended Vision" is a LASIK procedure where we use Zeiss MEL 80 Excimer laser to make your one eye (non-dominant eye) a little nearsighted. Your dominant eye then sees clearly in the distance and your non-dominant eye sees near. The brain blends the two together and you will not be aware of which eye you are looking through for distance or near. It is not like conventional 'Monovision' which is tolerated by 60% of the patients. LBV is accepted by 98% of the patients and the period of adaptation is very short.
In "Laser Blended Vision" the correction is not just making the non-dominant eye a little near sighted as in monovision. The laser also creates a "positive spherical aberration" in the center of the eye as well. Such a type of correction makes the image disparity from the two eyes smaller and the brain blends the images together even better. The monovision correction needs to change as one gets older. Monovision correction at 45 does not work well when you get to the age of 55. Laser blended vision on the other hand works well from 45 to 55 and beyond. The reading correction does not change after 55.
Before proceeding with the procedure you will be tested to see whether you can see far and near by correcting the dominant eye for the distance and the non-dominant eye for reading. If you can "tolerate" this disparity in the correction and see well for distance and for near. Then only you will be considered suitable for the procedure.
All lasers can do Monovision which is not the same as LBV.
"Blended vision" spectacles or contacts are technically not possible at this point in time. Even if it becomes possible your eyes have to look exactly through the centre of the lenses all the time to be effective-which is difficult because of the constant movement of the eyes. One can't even imagine the cost of such a custom correction eyeglasses or contact lenses.
WASCA with CRS master software analyze your eye to get the best correction profile for your LBV correction. The WASCA analyses your eyes to get a detailed data for your precise correction. This gives the data to the computer delivering the laser the detailed blueprint for your correction.
The creation of the corneal flap with the most advanced XP Microkeratome. XP stands for Xtra Precise. A drop of anaesthetic is used to numb the eye. A suction ring is placed to steady your eye. The creation of the flap takes only a few seconds. You feel a sense of pressure in your eye for very short period. It takes about 10 seconds to create the flap.
The flap can also be created using laser instead of the microkeratome. This adds more cost to the procedure. The IntraLase FS laser is a computer-guided, ultra-fast laser used to create a corneal flap. It takes about 29 seconds to create the corneal flap. There is a sensation of slight pressure in the eye during the procedure. The flaps of both right and left corneas are done and you are moved to the Zeiss laser which will do the actual correction
After the flap is created the flap is lifted to do the correction. The Eyetracker is engaged to lock to the center of your pupil. The laser is delivered to do the correction and the flap is placed back to its original position, the actual laser delivery time is between 15 to 30 seconds depending on your prescription. The process is repeated for the other eye.
The Ultra fast Zeiss MEL 80 Excimer laser corrects your personalised correction using the Precise Pulse Technology. This is the only laser that can do LBV. The electronic file generated using the CRS (Complete Refractive System) Master will guide the Zeiss MEL 80 Excimer Laser to precisely do the correction. The Mel 80 is super fast delivering the laser at 250 shots per second. The precise Eyetracker will track your eyes so the laser is precisely guided. The accuracy of the Eyetracker is so good it will track your eyes even if you can move your eyes 250 times a second!
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