Do you struggle to see clearly up close? you may have hyperopia. But it could also be presbyopia. The truth is they are similar optically but have very different causes. Since they are different conditions, the treatment options will vary as well.
Hyperopia occurs when the light that enters the eye can not focus on the retina, because the eye is to short, the light actually would focus behind the eye. This occurs when the distance between the front and back of the eye is too shot. People can have hyperopia at any age. Young children will often out grow hyperopia as they become older. However if they don’t, hyperopia can be corrected with either contacts or eyeglasses. For mild hyperopic corrections some reading eyeglasses can correct vision. Corrective surgery, such as LASIK, is one available treatment option.
Presbyopia, on the other hand, also causes one to have difficulty reading close up, but it is age-related, and affects people over 40. It is the result of the lens inside the eye becoming harder and losing flexibility with age. The visual result is similar to that of hyperopia; poor vision at near. In general, this is corrected with lenses. reading eyeglasses are commonly used to bring clarity to objects at near distances. Another option is to use contact lenses for monovision, when one eye is corrected for distance vision and the other corrected for near vision. Monovision wearers must train their eyes to adapt to a new way of viewing things up close and far away. Very similar to bifocal or progressive eyeglasses, multifocal contact lenses can correct presbyopia.
Hyperopia is not inevitable, and it can be treated surgically. Presbyopia will eventually effect us all, but until very recently was not treated with surgery. When eyes begin to lose flexibility and are no longer to see crisply and clearly close up, it is time for treatment. Even though there are surgical options available for presbyopia, the majority of people still choose a simple pair of readers. They are safe and do not require anestesia of lasers near the eye, plus they can be very stylish too. Once a person has accepted that they need reading glasses, they may as well get a pair that will be fashionable too.
Sunglasses are widely worn by each and every ages, even the most well known fashion brands have their own sunglasses offers… What are the prescription sunglasses?
Although very often we tend to consider eyewear as a form of decoration, sunglasses are first and foremost a protection of the delicate eye system from the impact of the ultraviolets. There are however people who cannot buy a pair of sunglasses and enjoy them because they have special eye conditions. This is the case with anyone who suffers from myopia, astigmatism or hyperopia. The solution for such cases is to be found in prescription sunglasses designed to match exactly the same features of the regular glasses but with ultraviolet protection. The UVB rays cause sunburn while the UVA rays get absorbed by the human eye lens.
Dark lens design and prescription lens structure represent a medical solution to create a product of sun protection eyewear type. There are different kinds of lenses used for prescription sunglasses, and here we can count polarized lenses, anti-reflective lenses, blue blockers, photochromic lenses and gradient lenses. Prescription sunglasses are designed only according to the ophthalmologist’s recommendations, and sometimes design is not possible because of the specificity of the eye problems. Some health condition such as eye surgery may require total prevention of sun exposure. This is why most often doctors prescribe sunglasses with 99 or 100% protection against UVA and UVB.
Some prescription sunglasses rely on a wraparound design that prevents the UV rays from entering from the sides. Here, the choice of the frame is everything because it should be large enough to allow for such protection. As for the anti-reflective properties, not only prescription sunglasses but most sunglasses in general have a special anti-reflective coating that ensures superior reflexion of the light. The amount of light that enters the eyes could also be limited by using mirror-coated lenses. The stage of the eye condition will also have an influence on the design of the prescription sunglasses.
For instance, people who suffer from advanced myopia may require very thick lenses, which could be incompatible with most of the frames. The presence of two or more health problems at the same time could also become an obstacle for the design of prescription sunglasses. The doctor should be able to recommend an adequate course of action, with the mention that the design of highly specialized prescription sunglasses is more difficult. Very few companies can provide such designs for low prices; the more complex the prescription sunglasses, the higher the price.