Benefits of Cataract Surgery
The lens is a bi-convex lens that is located in the anterior part of the eye, behind the cornea, and is transparent. Thanks to its transparency and refraction power (diopters), it makes the light that passes through the eye project onto the retina.
With age, this lentil-shaped lens loses its transparency and does not allow light to pass through. Therefore, it will not reach the retina correctly, and we will see blurred or disfigured images. Cataract surgery can be helpful in this stage.
Dr Cameron McLintok is
an expert carrying out this procedure in Brisbane. Cataract surgery takes just over 20 minutes for each eye. It is performed under local anesthesia, placing a few drops that anesthetize the sensitivity of the eye. The patient will not feel any pain, discomfort, or manipulation.
Benefits of Cataract Surgery According to the Type of Lens Used
Single Vision Lenses
They have the disadvantage that the patient needs glasses to see close up and for intermediate distances because they only have a single, sharp focus that is in the distance. Otherwise, they perfectly correct vision defects caused by cataracts. And they do not produce glare. They are the optimal lenses for people who do not mind doing without glasses to focus near or medium distance. They do not correct astigmatism.
Multifocal and Bifocal
These lenses achieve excellent near and far vision. Within these, there are in turn several types:
- On the anterior surface of the lens, there are two spherical areas of different radii in the form of concentric rings. One of the spheres improves the distance vision and the other the near vision. They have a major drawback, and that is, they produce nighttime flashes and glare.
- Similar in structure to the previous ones: They require excellent lighting for the lens to work, which depends on the coexistence of two light beams (one for near vision and the other for distance vision). It also has the drawback that this lens can cause ghosting and peripheral light fringes. Among the advantages are that the patient can do without close-up glasses to focus as in the previous case.
- They are a mix of diffractive and refractive lenses trying to preserve the best of each of them. They have been designed to achieve maximum distance and near visual acuity but require optimal lighting. This type of lens would not be indicated because it would not achieve good results in patients with a history of macular degeneration, glaucoma, dry eye, astigmatism, corneal leukoma.
Trifocal Lenses
This type of IOL has three foci in its optic zone, one for distance vision, one for near vision, and one for intermediate vision. Provides the ability to focus at three different distances.
Toric Lenses
Very indicated
in patients with astigmatism because they correct it at the same time as they correct the cataract. A major drawback is that they can be moved, rotated. If this occurs in the first week or two after the intervention, it can be repositioned by reoperating. After this time, it is very complicated since the lens remains anchored to the eye’s tissues, and its removal is more difficult.
Therefore, it requires that the patient has an excellent anatomical structure of his eye to anchor the lens so that it remains fixed and does not rotate. This type of lens is associated with any of the above. That is, trifocal, multifocal, or monofocal lenses can be toric in turn, to solve both problems at once.…
The lens is a bi-convex lens that is located in the anterior part of the eye, behind the cornea, and is transparent. Thanks to its transparency and refraction power (diopters), it makes the light that passes through the eye project onto the retina.
With age, this lentil-shaped lens loses its transparency and does not allow light to pass through. Therefore, it will not reach the retina correctly, and we will see blurred or disfigured images. Cataract surgery can be helpful in this stage.
Dr Cameron McLintok is an expert carrying out this procedure in Brisbane. Cataract surgery takes just over 20 minutes for each eye. It is performed under local anesthesia, placing a few drops that anesthetize the sensitivity of the eye. The patient will not feel any pain, discomfort, or manipulation.
Benefits of Cataract Surgery According to the Type of Lens Used
Single Vision Lenses
They have the disadvantage that the patient needs glasses to see close up and for intermediate distances because they only have a single, sharp focus that is in the distance. Otherwise, they perfectly correct vision defects caused by cataracts. And they do not produce glare. They are the optimal lenses for people who do not mind doing without glasses to focus near or medium distance. They do not correct astigmatism.
Multifocal and Bifocal
These lenses achieve excellent near and far vision. Within these, there are in turn several types:
- On the anterior surface of the lens, there are two spherical areas of different radii in the form of concentric rings. One of the spheres improves the distance vision and the other the near vision. They have a major drawback, and that is, they produce nighttime flashes and glare.
- Similar in structure to the previous ones: They require excellent lighting for the lens to work, which depends on the coexistence of two light beams (one for near vision and the other for distance vision). It also has the drawback that this lens can cause ghosting and peripheral light fringes. Among the advantages are that the patient can do without close-up glasses to focus as in the previous case.
- They are a mix of diffractive and refractive lenses trying to preserve the best of each of them. They have been designed to achieve maximum distance and near visual acuity but require optimal lighting. This type of lens would not be indicated because it would not achieve good results in patients with a history of macular degeneration, glaucoma, dry eye, astigmatism, corneal leukoma.
Trifocal Lenses
This type of IOL has three foci in its optic zone, one for distance vision, one for near vision, and one for intermediate vision. Provides the ability to focus at three different distances.
Toric Lenses
Very indicated in patients with astigmatism because they correct it at the same time as they correct the cataract. A major drawback is that they can be moved, rotated. If this occurs in the first week or two after the intervention, it can be repositioned by reoperating. After this time, it is very complicated since the lens remains anchored to the eye’s tissues, and its removal is more difficult.
Therefore, it requires that the patient has an excellent anatomical structure of his eye to anchor the lens so that it remains fixed and does not rotate. This type of lens is associated with any of the above. That is, trifocal, multifocal, or monofocal lenses can be toric in turn, to solve both problems at once.…
