Which lens is better for cataract surgery

During cataract surgery, the lens actually needs to be replaced so that the cataract patient's vision can return to normal. There are actually several types of surgical lenses to choose from. Rather than saying which lens is better, it is better to say which lens is more suitable, because the choice needs to be based on the patient's condition, so it is best for patients to make a choice based on the doctor's advice.

1. Hard artificial lens. The incision is about 6mm and requires sutures. Because the sutures will cause a certain amount of astigmatism, there will be a big reaction in the short term after the operation and the recovery time will be long. The price of hard crystal is generally less than 1,000 yuan. It will be chosen by some patients whose families are in financial difficulty; and by some patients whose cataracts are almost mature and who cannot undergo phacoemulsification and have to undergo ECCE surgery, because the incision already requires 5-6mm, they will also choose hard artificial lenses.

2. Foldable artificial lens. In Shanghai, most (more than 60%) patients will choose this type of artificial lens. The artificial lens is first folded, placed in a special implanter, and then pushed into the eyeball and unfolded, so the incision is generally 3.2-3.5mm. This incision does not require sutures, has less astigmatism, and a faster recovery time. The approximate price is between 1500-2999. Please note that not all expenses will be reimbursed when medical insurance is applied for reimbursement. Generally, only 600-900 yuan will be reimbursed (the reimbursement ratio varies for different insured persons and different hospitals). The excess amount needs to be borne by yourself. Please consult the medical insurance agency before the operation.

3. Specially treated artificial lens. For some patients with specific eye diseases, this type of intraocular lens may be needed, such as the intraocular lens with heparin surface treatment, which has a much smaller inflammatory response after surgery. The price is probably more than 3,000 yuan.

4. Bifocal/adjustable intraocular lens. This type of intraocular lens is designed to provide both distance and near vision. The first three types of artificial lenses have only one focus, which allows you to see far objects clearly, but you need to wear reading glasses to see near objects, or vice versa, allowing you to see near objects clearly, but you need to wear myopia glasses to see far objects.

A bifocal intraocular lens is an intraocular lens with two focal points, one for far vision and one for near vision. In principle, when one of the two focal points is in use, the other one must be out of focus, which means that there will be two images on the retina, one clear and one blurry. Bifocal intraocular lenses, whether refractive or diffractive, use the reflection of the pupil to change the energy distribution of near and far focal points, so as to maximize the clear energy and minimize the blurred energy.

The price of bifocal/adjustable intraocular lens is about 3000 or more

In addition, the design of intraocular lenses began to develop towards aspheric and yellow. There are still many differences in academic opinions on this topic, and the choice of artificial lens depends on the surgeon's preference.

Aspherical artificial lenses can reduce wavefront aberration, which simply means better image quality.

The yellow artificial lens is designed to filter out some of the blue light. Some ophthalmologists believe that blue light can cause damage to retinal cells, so filtering out some of the blue light can protect the fundus, especially the macula. There are now color-changing artificial lenses that are transparent in dark environments and turn yellow when the light is strong.