Which type of cataract lens is better

When cataract patients undergo surgical treatment, they generally need to replace the lens so that their vision can be restored, but there are many options for lenses. Lenses have different types, functions, and colors, so the prices are also different. Patients should follow the doctor's advice and make the best choice based on their own circumstances.

Artificial lenses come in different styles, functions, and colors, and their prices vary greatly, ranging from a few hundred to tens or even tens of thousands. It is worth considering how to choose a suitable lens, because artificial lenses should not be replaced after installation. A one-time choice will affect your long-term visual experience in the future.

According to the location of lens installation, it can be divided into two types: one is the anterior chamber intraocular lens, which is fixed on the iris. This type of lens is prone to cause complications such as iridocyclitis and corneal endothelial decompensation, and is rarely used now. The other is the posterior chamber intraocular lens, which is generally placed in the capsular bag and is most consistent with the original eye structure and has no effect on the inside of the eye. This type of lens is basically used now, and the ones introduced below are all posterior chamber intraocular lenses.

Based on the structure of the lens, it can be divided into two types: one is a three-piece artificial lens, which is composed of three basic units, including two loops and an optical surface. The other type is a one-piece intraocular lens with two haptics and the optical surface formed in one piece. There is no difference in the use of these two crystals, so they can be considered secondary. If you really have to choose, you don't have to consider whether the interface of the three-piece type is firm when choosing the one-piece type.

According to the foldability of artificial lenses, they can be divided into two types: one is a hard lens, which cannot be folded and is an early lens. It can be chosen for old-fashioned large-incision surgeries. If it is the current mainstream small-incision surgery to install this type of lens, the incision needs to be enlarged, because the current surgical incisions are less than 3mm, and the optical surface of the lens is at least 6mm. If it cannot be folded, the incision must be at least doubled. The other is a soft lens, which can be folded and can pass through a smaller surgical incision. It is the mainstream choice of lenses now.

Artificial lenses are divided into two types according to their color: one is a transparent lens, which is completely light-transmitting, but ultraviolet light and some blue light will damage the macula. The macula is the most important and sensitive part of the body for photosensitivity, and damage to it has a great impact on vision. Therefore, another type of lens is produced - the yellow lens. This type of lens can filter out shorter wavelength blue light and even shorter wavelength invisible light (such as ultraviolet light), and thus protect the macula to a certain extent. However, yellow lenses can reduce brightness. For patients with poor visual function (such as glaucoma patients), they can consider wearing sunglasses when going out to block harmful light. When they return to the room without harmful light, transparent lenses will provide better visual effects.

According to whether they can correct astigmatism, they are divided into two types: one is non-astigmatism correcting lens. For patients who have astigmatism before surgery, after this kind of lens is implanted, if they still have astigmatism after surgery, they can wear glasses to correct it; the other is astigmatism correcting lens. For patients who have corneal astigmatism before surgery, the lens can offset the degree of corneal astigmatism accordingly, and basically reach a state of no obvious astigmatism after surgery, and the visual effect is more natural.

According to whether aberration occurs, it is divided into two types: one is spherical crystal, and early crystals all belong to this category. Due to the occurrence of aberration, the pupil is small and the impact is not great in bright places, but in dark places, when the pupil is dilated, the vision is not clear enough, especially glare will occur, which will affect night driving, etc.; thus another type of crystal was produced - aspherical crystal. This type of crystal eliminates spherical aberration through aspherical design, is not affected by pupil size, and there is no obvious glare when looking at lights at night.