Strength
Reading glasses usually Boundary From +0.25 to +2.50 diopters (from measurement unit for eye prescriptions), although the average starting power usually occurs around +0.75. In the rare cases, reading the power of the glass can be up to 4.00.
“Tips to buy online reading glasses are equivalent to buying ready -made readings glasses at the drug store: this is an easy option, but it’s not a good idea for everyone,” says Ravi Goyal, a clinical spokesman for MD,. American Academy of Opthemology. “If you have different prescription requirements in every eye, estigateism, high strength or more complex prescription requirements, you should see eye -care professionals for the latest prescription iPare.”
President of Dr. Steven Red, American Optometric AssociationHe added, “Invalid prescription can cause headaches, eye pressure or even nausea. If you choose to buy online, we recommend choosing less power when deciding between the two powers, as it is usually a safe choice, and more stronger lenses are more common than those who are more prone to those.”
Goyal notes that everyone over the age of 40 should see the gynecologist for a medical eye exam because it is age when it usually begins to suffer from publishing and potentially blinding eye diseases. In addition, all eye diseases do not begin with significant symptoms.
Type of reading glasses
Goyal explained, “There are four important types of reading glasses: single vision, biofuqual, tract and progressive.”
- Single vision reading lenses Usually designed to correct only for the nearest vision.
- BIFOCAL LEANS Correction to read at the bottom of the lens and the other for distance from above.
- trifocal lens There are three parts: distance, intermediate and close vision. Red says it can be especially helpful for more than 50 people who face depth of attention.
- Progressive lenses Demonstrate smooth transfer between distance and nearly focal areas without distribution lines. “They provide more natural shapes and smooth transitions between different distances to see,” says Red.
Red says, “When ordinary OTC readers are no longer enough, prescription glasses-also known as single vision readers-this is a very good next step. They are customized by eye doctor so that it can be corrected, unlawful or unnecessary.” “For those who need a number of vision improvement, there are multi -focal lenses.”
The content of the glasses
“It depends on a lifestyle,” says Goyal. “For example, if you spend a lot of time outside, you can prefer polycarbonate, which is lightweight and does not break easily. Different lenses are also available for convenience (ie, anti -reflective coatings) but it is not needed.”
Goyal notes that the American Academy of Opthmology does not recommend Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Blue Light Bluelets Goyal Goyal Goyal Goyal does not recommend that there is no scientific evidence to help reduce eye stress. Instead, take a break from work activity and use eye drops if necessary. If you continue to experience the symptoms, see a specialist.
According to Red, most people choose between the following three lens materials to read glasses:
- CR-39 Plastic Lens: Provides cheap, lightweight and good optical explanation, which makes them a popular choice of basic glasses.
- Polycarbonate lens: CR-39 Mild and significantly more effective resistant than plastic, creates a safe option for people who leave their glasses or want something more durable.
- High Index Plastic Lens: Sleep and light from other materials and a good choice for those who need strong prescriptions but they want to avoid thick, heavy lenses.
“For most reading glasses, especially occasionally or internal use, CR-39 plastic works well,” says Red. “If you need extra stability or prefer thin, light lenses, polycarbonates or high index content, it can be better fit. Your optometry doctor can help recommend the best content of the lens based on your specific requirements.”
Red added that not all lens content and coatings are made equal. That is why it is important that you check with your eye doctor to ensure that the readers you choose are fit for you.
Manner
A very interesting part of buying glasses is to find a frame that talks in your personal style and fits with your face shape. When purchasing online glasses, pay attention to material, color and width.
Charge
Reading glasses can be cheap to expensive. For example, if you want a reading glass designer pair, be ready to spend more than $ 100. If you have a tendency to lose your reading glasses, you want to buy more cheap couples to keep more than one hand.
Goyal explains, “The price of the springs is not necessarily a reflection of the quality. The real question is if someone is helpful to the ready -made readings read glasses or if it needs customs readings glasses to meet their vision requirements,” Goyal explained.
“Generally, spending too much on frames does not mean that you will end up with better quality springs. You don’t need designer frames to keep a good set of glasses. Prescription glasses, such as biofucles, tract or progressive lens, will help you choose a good lease.
Additional coatings
You can get glasses read with blue light, anti -sheets and polarization lenses treated with coatings. But note that you have to pay an extra price for them.
Shipping and returns
If you buy your reading glasses online, you will not need to try them before buying. As a result, make sure the company has a return and exchange policy with which you can work. As far as shipping is concerned, if you need your reading glass asap, you will be better than going to a company that offers express or shipping overnight.
