Faqs

FAQ’s Regarding LASIK surgery ( Laser Vision Correction )

LASIK SURGERY

A laser procedure to remove spectacle numbers. It stands for Laser in situ keratomelusis. The basic principle of the surgery is to change the shape of the cornea in such a way to allow the rays of light to fall as a pin point image on the retina thus allowing the image to be clear without a refractive medium like glasses.

A thin corneal flap is made with the help of a microkeratome, and is lifted away like opening a page in a book. The remaining corneal bed is ablated with the help of an eximer laser to change the shape of the cornea, and then the thin flap is placed back in the original position. The laser is software guided so it is extremely accurate. The shape of the cornea, now with latest technology, can be customized with the help of wave front guided customized ablation to achieve superior results.

There is no hard or fast rule on what the limit of the numbers should be. It is individual for every patient. The limit depends on the refractive error with respect to the patient’s corneal thickness. For example a patient with -12D sphere could have good enough corneal thickness for treatment, and a patient with -3D sphere may not have enough cornea for treatment and vice versa. Hence it is important to go through a complete examination with your Doctor. If your corneal thickness is not enough for the required treatment then there are other treatment options available to be spectacle free. Having stated the above LASIK can treat minus numbers(MYOPIA) Plus Numbers (HYPERMETROPIA) and cylindrical numbers (ASTIGMATISM). Higher the number more corneal thickness is required.

There is no hard or fast rule on what the limit of the numbers should be. It is individual for every patient. The limit depends on the refractive error with respect to the patient’s corneal thickness. For example a patient with -12D sphere could have good enough corneal thickness for treatment, and a patient with -3D sphere may not have enough cornea for treatment and vice versa. Hence it is important to go through a complete examination with your Doctor. If your corneal thickness is not enough for the required treatment then there are other treatment options available to be spectacle free. Having stated the above LASIK can treat minus numbers(MYOPIA) Plus Numbers (HYPERMETROPIA) and cylindrical numbers (ASTIGMATISM). Higher the number more corneal thickness is required.

Remember at the end of the day it is a surgical procedure. The older machines use to give irritating side effects like haloes, glare, contrast problems, and higher re- treatments rates. The newer machines give excellent results without the above side effects because of improvement in the laser, software, and eye tracking systems. Please consult your doctor on what machine and treatment planning is the best for you. Just walking into any centre and getting LASIK done could lead to unexpected, undesired, permanent results.

It takes about 7mins per eye so 14-20 mins for both eyes.

We use anesthetic eye drops so there is no pain, but there is some pressure sensation when the microkeratome is placed on the eye to make the flap. Otherwise there is no pain sensation.

All patients notice the visual change immediately after the procedure even though the vision may not be 100%. Some patients start seeing full 30 mins after the surgery, while most patients start seeing full the next day. The sharpness comes once the corneal edema subsides which could take 4-7 days depending on the patients healing.

Usually the next day, depending on the type of job. Your eye surgeon will inform you when you can start work. Usually patients resume their normal duties in a couple of days.

It is very rare now a days with new technology for the numbers to come back. In Theory some number can always come back, however the full number will never come back. This is what is called as regression, and it is easily solved by doing a touch up (re-enhancement) with the laser. If the surgery is done on an out dated machine the re-treatment rate and side effects are much higher. Please consult your doctor on what machine and treatment planning is the best for you.

FAQ'S REGARDING CATARACT SURGERY.

CATARACT SURGERY

Cataract is the clouding or opacification of the normal human lens.

The most common cause is old age. It could be present from birth or can be acquired from diseases like Diabetes, kidney disease, drug induced, trauma and exposure to UV rays of the sun or other forms of radiation.

The only form of treatment is surgery.

The principle behind cataract surgery is to completely remove the opaque human lens and replace it with a clear artificial lens implant. The latest and the most effective procedure is Phacoemulsification, where the cataract is broken down into small pieces and the aspirated so that visual recovery is prompt.

Not directly, but makes the surgery safe indirectly. New technology makes the surgeon’s job easier, not the patients. If the surgeon is reasonably skilled with new technology then it would indirectly help the patient. For example, a computer will only help a person if he/she knows how to use it, otherwise it could be quite cumbersome to use if one had no knowledge of computers. Also using new technology in the wrong circumstance could have devastating effects. So it is important for the surgeon to choose the right procedure based on the type of case. Otherwise complications remain the same whatever procedure is performed.

If a monofocal lens is put then glasses will be required for reading. There are multifocal lenses which get rid of both numbers but have side effects of glare, haloes and night vision problems. In any case the calculation of the lens power is totally machine dependent, they are highly accurate but can give an error of +/- 2 to 3 dioptres at times no matter what lens is used. It is important to realize that cataract surgery is not a refractive surgery designed to make patients’ spectacle free, but to improve their vision whether or not glasses are required. Aggressive healing can lead to post operative astigmatism. But one thing is for sure that by placing a lens, spectacle dependence will be less.

Patients have the misconception that they would see 100% after the pad is removed because good technology is used. The truth of the matter is that visual recovery depends on the patients healing. New technology improves the recovery time but it’s not magic. No 2 eyes will recover at the same rate. At the same time no 2 patients will have the same recovery time. The surgeon may inject an air bubble in the eye to keep the wound tight. As these are suture less surgeries, air is less likely to leak then fluid. Hence for safety air is injected to prevent wound leak related infections. In this case it would take 1-3 days for the bubble to get absorbed for the patient to see clearly. At times the cornea could be hazy after the surgery due to fluid collection which would take 5 to 12 days for recovery. Also the general health of the eye has to be good. If the patients has a weak retina due to whatever cause, or any other eye related problem, then the vision may not match the patient’s expectation. If there is a refractive error left, then glasses are prescribed 2 to 3 weeks after surgery. If sutures are taken then full recovery could take 2 to 3 months.

99% of the time sutures are not required. But if the surgeon on table finds that the wound is weak and leaky, or the patient has a condition which would retard healing, then for the safety purposes sutures are taken, even though a procedure like Phacoemulsification (laser) is done.

Cataract surgery is an elective surgery, it can be done at any time. There are some misconceptions that surgery should be done during the winter and not in the summer. If that was the case then in places like Saudi Arabia, where it is perpetually hot year round, patients would have to go to north pole to get operated. Ideally once a patient has been diagnosed with cataract, it is good idea for the patient to start planning when he/she wants to get it done. The earlier the better, as when the cataract is soft, it is easier to remove by Phacoemulsification. The harder the cataract gets then higher the risk of complications. If the cataract is very hard, then the surgeon might choose an alternative procedure other than Phacoemulsification.

(Is the cataract mature) is a concept of the past when phacoemulsification did not exist. So don’t wait unless the doctor tells you to wait. And if you want to wait then follow the doctor’s instructions regarding follow up advice.

As mentioned before everyone has a different healing capacity. On the third day, after surgery, on follow up the surgeon will give you a clue as to when you can resume your duties

The implant is life long so choose your cataract package wisely. If there is a problem, whereby the only way to solve the problem is to remove the lens, then it will be removed and replaced, otherwise it is permanent.