What Are Prescription Glasses ?
How To Select Perfect Pair Of Prescription Glasses ?
Prescription glasses are those that your eye doctor has prescribed to correct the refractive error that is causing your vision problems.
Prescription glasses are recommended when the normal shape of your eye is deformed. The deformed shape of the eye creates a refractive error, which causes vision problems. The person affected by refractive error cannot clearly see the objects.
Eyeglasses are prescribed by your eye doctor (ophthalmologist) to correct the refractive error that has affected your normal vision. Your prescription number depends upon the specific type of refractive error. Prescription glasses are tailor-made for your vision needs.
Dr. Swati Sathe 's Eye Clinic
Ophthalmologist , Eye Specialist , Eye Surgeon , Contact Lens Specialist , Glaucoma Specialist
Welcome to our eye clinic . Dr Swati Sathe is Consultant Ophthalmologist , Eye Specialist And Practicing Eye Surgeon In Koregaon Park in Pune. This eye specialist clinic is well equipped with latest eye care equipment to provide the best eye care services.
When Do You Need Prescription Glasses ?
Most people approach the eye specialist doctor to seek treatment for symptoms like eye strain, difficulty focusing, hazy and unclear vision, headaches and other such symptoms.
Depending upon your age, symptoms, routine eye examination, and other factors, your eye doctor would perform the necessary tests to diagnose the causes that have affected your normal vision.
Your child might also need prescription glasses if their normal vision is affected. It can be difficult for parents to accept the fact that their child will need to wear glasses at times.
What Kind Of Tests Are Performed For Prescription Glasses ?
Your eye specialist doctor would perform a number of tests depending upon your age, vision problems, symptoms, results of a routine eye examination, and other factors. These tests are necessary to precisely diagnose the health condition of your eye and the causes that have affected your normal vision.
The following tests are performed by your eye doctor to diagnose your vision problem and write the prescription accordingly.
- Visual Acuity Test.
- Slit Lamp Test.
- Auto-Refractometer Test.
- Vision Chart Test.
What Is Visual Acuity Test ?
The visual acuity test is a type of eye test performed by your eye doctor to find out which lens should be prescribed to correct the vision error. It is also commonly referred to as an eye number test or simply a vision test.
The visual acuity test is used to determine the smallest letters you can read on a standardized chart (Snellen chart) or a card held 20 feet (6 meters) away.
The traditional vision charts are now replaced by the latest digital special charts displayed on the monitor kept at a specified distance. The digital vision charts also offer many options for different types of vision charts to be used during the visual acuity test.
Types Of Prescription Glasses
Different types of prescription lenses are prescribed to correct specific type of refractive error that is affecting the vision. Depending upon the nature of the refractive error, a person might need either single vision glasses, bifocal glasses, reading glasses, or the latest multifocal or progressive glasses.
- Single Vision Prescription Glasses.
- Bifocal Prescription Glasses..
- Multifocal Prescription Glasses..
- Progressive Prescription Glasses.
- Reading Glasses.
Single Vision Glasses
Single vision prescription lenses are used to correct a single vision problem. The single vision problem could be either near-sightedness, farsightedness, or astigmatism.
The single-vision lenses contain the same amount of vision correction throughout the entire body of the lens. Ready to use single vision reading glasses are readily available that you can buy as per your prescription.
Customized single-vision glasses can also be prepared using special-colored lenses with UV protection. This is very useful for outdoor use as driving glasses.
Bifocal lenses contain two prescription numbers in one single lens. The eyeglass lens is split into two sections. The upper part of the lens is used for distance vision. whereas the lower part of the bifocal lens is used for near vision.
The use of bifocal lenses is on the decline due to the advent of multifocal lenses and the visibility of the line between their near-sighted and farsighted prescriptions.
Multifocal lenses are prescribed for people with more than one vision problem who often need eyeglasses with multifocal lenses. Progressive lenses are basically multifocal lenses that contain two or more vision-correcting prescriptions.
Progressive lenses are multifocal lenses with three distinct fields of view. The bottom portion of a progressive lens is utilized for close-range vision or reading. The progressive lens’s central section is designed for intermediate and near-distant vision.
The progressive lens’s upper part is utilized for long-distance vision. Progressive lenses have the best appearance and resemble single-vision lenses. There is no obvious border between prescriptions on these lenses. This provides the user with a smooth and uninterrupted transition from close-up objects to far distances.
Professionals who spend considerable time working on computers are exposed to blue light and fatigue, which have a harmful effect on the eyes in the long run.
Special prescription glasses for high computer usage contain a special blue light filter coating ( Essilor Blue Light Protection Lenses ). The blue light filter is helpful in minimizing harmful blue light exposure.