Refractive errors refer to optical conditions caused by the prevention of sufficient light from reaching the retina. The shape of the eyes prevents light from reaching the retina, which leads to blurred vision.
The leading causes of refractive errors include ageing of the eye lenses and variations in the cornea shapes. These errors may be diagnosed through a comprehensive examination of the eyes by ophthalmologists and optometrists.
Factors Causing Refractive Errors
The first cause of refractive errors is the length of the eye. If one’s eye is longer than its regular length, the eye focuses light before reaching the retina, leading to nearsightedness. This type of refractive error is known as myopia. On the other hand, if the eye is shorter than its average length, it fails to focus light on time before it gets to the retina. This leads to farsightedness also known as hyperopia.
Secondly, the curve of the cornea leads to a refractive error. The shape of the cornea is spherical. If its shape is not entirely spherical, the eye refracts the image or focuses it irregularly leading to astigmatism, which leads to blurred vision at all distances.
Lastly, refractive errors are caused by ageing. The lens becomes rigid, and this limits its ability to flex easily. Consequently, the ability of the eye to focus is lost and reading at close range also becomes a problem leading to presbyopia.
Ways of Getting Rid of Refractive Errors
According to the FAQs of Personal Eyes, one of the specialists, there are several factors considered before initiating a particular way of getting rid of refractive errors. The factors include your age, vision, the health of your eyes, and your general health. Some of the ways of getting rid of refractive errors are:
- Use of Eyeglasses
This is the safest way of getting rid of refractive errors as it does not involve surgical procedures on the eyes. Appropriate lenses can be prescribed to remove the refractive error and give the eyes an optimal vision.
2. Insertion of Contact lenses into the Eyes
The contact lenses become the eyes’ refractive surface where the rays of light land first when entering the eyes. This leads to more accurate refraction.
3. Refractive Surgery
This surgery is aimed at changing the cornea’s shape permanently. The change in the shape of the eye will restore the eye’s focusing power by allowing rays of light to focus accurately on the retina to guarantee improved vision. The surgery can be used to correct presbyopia, astigmatism, hyperopia, and myopia.
4. Use of Intraocular Eye Lenses
Intraocular Eye Lenses are implantable lenses used in replacing the eye lenses, which are removed in the process of cataract surgery. These lenses are used to correct severe refractive errors. The lenses can either be multifocal or mono-focal.
5. Placing of Corneal Rings known as Intacs
The intrastromal ring is inserted into the cornea as an implantable lens to treat a patient who is moderately or highly affected by a myopic condition. Before going for this option, the opinion of a refractive surgeon is essential. This is because the surgeon will advise on the benefits and risks associated with every patient depending on their condition.
Conditions related to refractive errors are prevalent in almost all parts of the world. As such, regular checkups for eyes are necessary. If diagnosed with refractive errors, several options are available to remedy the error. These range from permanent solutions like refractive surgery to temporary remedies like eyeglasses and contact lenses.