Contact Lenses for Presbyopia: Be Prepared to Get Spoilt For Choice
With time along with our body, our eyes also age and it becomes hard to maintain the perfect eyesight even though we seem to take every care as possible. Well, this is the time when we all have to take on to reading glasses. This deterioration in the eyesight occurs due to the deterioration in the refractive power of the lenses inside our eyes which hampers the focussing capacity on far and near objects making vision really problematic. The condition is known as Presbyopia in ocular science and occurs generally in the middle age. A lot of people dread the idea of being Presbyopia as they fear wearing boring bifocals or grandma-type reading glasses. However, with the development in ophthalmology and different ways to improve vision, fortunately you can now choose from a lot of options available!
Contact Lenses for Presbyopia
Until a few years ago, being presbyopic meant that you have to have a pair of reading glasses though you may wear contact lenses to correct your distant vision. With bifocal and multifocal lenses available now in all leading brands, eye care professionals prescribe contact lenses to correct presbyopia. The name itself implies that the lens has two or more focal length. One aids in a clear distant vision whereas the other helps in reading and other works that require a close gaze. Some lenses also come with a third focal length to help intermediate vision as well and these contact lenses are known as progressive contact lenses. However, there are some drawbacks in these lenses that may make vision not so comfortable for fussy users. The obvious line and the image jump is something that many users are not ready to compromise with. So, the intriguing question, why some people use bifocal contact lenses while others multifocal contacts has no obvious answer as it depends on the person mostly. People who have difficulties in vision because of advanced presbyopia need correction for their intermediate vision as well. There are also people who need a clear intermediate vision for their pursual of personal hobbies or work. So, progressive lenses are for the ones who are more discrete about their vision.
Bifocal and Progressive Contact Lenses
Bifocal contact lenses with different designs are available in various brands when it comes to bifocal contact lenses for Presbyopia. There are even lined bi-focal lens called translating or alternating lenses which are the popular choice of many presbyopic contact lens users. However, bi-focal lenses are available mostly in hard or rigid lenses so that the lenses can easily float on the tear film covering the corneal surface to help in oxygen permeability and tear transfusion.
Progressive lenses came into the picture almost forty years ago and since then it has remained one of the advanced contact lenses to correct complex vision problems like advanced presbyopia. The intermediate channel of the progressive lenses aids in continuous vision. However, like all other discoveries of science, it is not a mixed bliss. The limited reading area that is aided by progressive lenses accentuates blurriness at the peripheral regions near the nasal and temporal part. These blending zones, as they are called, though remains unused when comes to vision, but can cause a peculiar problem in vision for a wearer who is going to wear it for long. The user has to move the head while observing an object in motion and cannot just move the eyes as moving the eyes will make the gaze through the part which is facilitated for reading. It requires some real adjustment to become used to these lenses, even one to two weeks!