Understanding Eyewear: Single Vision Lenses’ Meaning

Are you struggling with your eyesight? Have you been researching online to understand single vision lenses’ meaning and whether you need them? Before we begin, let’s define a few of the most common vision correction issues.

What Are the Most Common Refractive Errors?

The three most common refractive errors that can be corrected with eyeglasses are myopia, hyperopia, and astigmatism.

Myopia refers to nearsightedness or near vision, which means a person can see objects up close but can’t see them from a distance.

Hyperopia is a refractive error that allows someone to see objects far away but not up close. Books and smartphones may appear blurry, but distance vision remains clear.

Astigmatism is an error that involves the shape of the eyeball itself. With astigmatism, the eyeball is misshapen and causes halos of light to appear, especially when looking at lights at nighttime. This can make night driving difficult.

If you have only one of these refractive errors, you will need single-vision eyeglass lenses. If you have more than one, you will need multifocal lenses.

Single vision lenses work for individuals who are nearsighted, farsighted, or those who suffer from astigmatism. These are lenses that provide vision correction for a single distance. Essentially, this means that the lens type is designed to help farsighted people see better at shorter distances and nearsighted people at longer distances.

A majority of eyeglasses wearers use this type of lens. This article will discuss what you should know about what single vision lenses mean, how they correct eyesight, and the options available.

How Do Single Vision Lenses Work?

To offer clear vision, those who suffer from nearsightedness (myopia), farsightedness (hyperopia), and age-related farsightedness (presbyopia) need these lenses to address their eye conditions. The lens power in single vision glasses has the ability to improve sight at a distance and magnify vision.

Single vision lenses diverge or converge light rays to correct vision in the cornea. This reduces eye strain and increases the eye’s focusing power, allowing for distance correction. You’ll see clearly and won’t have to strain your eyes. Single vision lenses can also provide a sight-magnifying effect, making them ideal for farsightedness.

Single Vision Lenses Material Options

Picking your frames for a pair of single vision glasses is the fun part, but there are a lot of terms thrown around that can be confusing when it comes to lenses. Depending on your personal preference and your optician’s or optometrist’s advice regarding your eye condition, you’ll have some decisions to make.

It’s important to choose the kind of lens material that will help you get the maximum benefit from your glasses, and an optician can help walk you through your options. Some of the most common material choices for single vision lenses include:

Polycarbonate

If you’re looking for a single vision prescription to protect against harmful ultraviolet rays, then polycarbonate lenses are a great choice. UV rays encourage the development of cataracts, which are also known as clouding in the lens of the eye.

A pair of glasses with polycarbonate material provides 100% blocking of the sun’s UVA and UVB rays. As a bonus, they’re also built to last — in fact,polycarbonate lenses are impact-resistant and shatterproof.

1.5 Plastic

Made from lightweight and durable plastic, 1.5 lenses balance thickness and weight with optimal performance, and are great for a wide range of prescription strengths. 1.5 plastic lenses can also be customized with different coatings to reduce glare or add UV protection.

1.67

Compared to 1.5 lenses, 1.67 lenses are made from a denser material that is more efficient at bending light, resulting in a thinner, lighter lens. Because they have a higher refractive index, these lenses aren’t as thick, making them a great choice if you’re looking for a more aesthetically-pleasing pair of glasses.

1.74

As the thinnest option, 1.74 lenses tend to come at a higher price point, but are aesthetically-pleasing, comfortable, and lightweight. These lenses are crafted using a material with an even higher refractive index, minimizing lens thickness while giving you fantastic vision correction.

What Else Might Your Lenses Include?

Aside from the actual material of the lens, your glasses may also include certain coatings or filters. Here are some of the most common options.

Anti-Glare

Also referred to as anti-reflective coating, anti-glare material on eyewear reduces the level of internal and external reflection on the lens. This goes a long way to reduce eyestrain, which ultimately improves eye health. Anti-reflective coating is especially helpful for those who have blurry vision at night or who have stronger prescriptions.

Blue Light Blocking

Who isn’t guilty of looking at their phone right before bedtime? When it comes to the kind of light the human eye can see, often referred to as blue light, these lenses give your eyes some relief from screen time. Blue light-blocking single vision lenses filter out excessive blue light to promote better eye health.

But the damage to our eyes doesn’t stop there. Blue light is intrusive and constant. It comes from the sun but also from sources like our smartphones, televisions, and computers. Blue light can reach our retina, and experts say this can be troublesome for our health, like sleep. Shielding our eyes is essential for getting a good night’s sleep and keeping our eyes safe.

Photochromic

Photochromic corrective lenses, or as we call them Light Responsive lenses, come with a chemical coating that allows them to turn to a dark tint in the presence of the sunlight. They’re also called transition lenses because they react quickly to changing light.

If you don’t want to carry a different pair of sunglasses to match the weather, these lenses are an option. Another remedy is to try out Pair Eyewear’s Sun Tops, which snap right on top of your chosen frames.

However, be aware that photochromic lenses won’t work in vehicles. Most cars have UV protection in their windshields, making it impossible for your lenses to darken while driving or riding in a car. You’ll still need Sun Tops or sunglasses when driving — or assuming your role as passenger princess.

Scratch-Resistant Coating

Applied to the front and back of lenses during the manufacturing process, scratch-resistant lens coating makes lenses harder to scratch, even when dropped against a hard surface. This is a great option to help cut down on wear and tear, extending the life of your lenses.

Polarized Lenses

Polarized single vision lenses are sunglasses that protect your eyes from light that bounces off smooth, highly reflective surfaces, like water or the windshield of a car. They work by controlling certain light properties and limiting specific wavelengths. They boast a vertical filter that doesn’t allow horizontal glare to pass through.

Single Vision Lenses Meaning vs. Other Types of Lenses

Now that we’ve explored what single vision lenses mean, here's how this lens compares to other types of vision correction:

Single Vision vs. Bifocal Lenses

The difference between these two types of prescription lenses lies in their ability to correct sight at a variety of distances.

While single vision lenses make it easy to see clearly at a single distance, bifocal lenses are split into two sections to accommodate those who have both distance refractive errors and need vision correction due to presbyopia. The primary purpose of bifocal lenses is to provide clear vision for both distance and for reading.

Single Vision vs. Trifocal Lenses

Trifocal lenses come with three focal areas that are separated by visible lines. The focal areas target vision at varying distances (close, intermediate, and far). In other words, these lenses accommodate different prescriptions in a single lens so that you can focus clearly on objects at a wider range.

Single Vision vs Progressive Lenses

Though similar to trifocals in that they provide multifocal lenses, progressive lenses don’t have lines separating the different correction fields. Instead, there’s blending between the prescriptions, and they’re more customizable. Think of progressive lenses as the contemporary evolution of bifocals or trifocals, allowing you to have vision correction for multiple distances all in one stylish pair of glasses.

How To Choose a Single Vision Lens

Single vision lenses correct your vision for either distance, near or intermediate distances. They are made using the prescription supplied by your Optometrist to correct your specific visual needs. After your eye exam with your eye doctor, how do you choose a single vision lens?

Here are some tips:

Use Your Prescription

Your eye doctor’s prescription is the most vital element in correcting your eyesight. It’ll also help inform the kind of lenses you should purchase for your eyeglasses.

Remember, every time you go for an eye check-up, your optometrist may update your prescription. In case you're facing any challenges with your new lenses, your optician will help you navigate until you find lenses that suit you best.

If you don’t have a prescription and simply need reading glasses, we offer those, too. When you select your Base Frames, you can easily select reading glasses at checkout, as well.

Consider the Type of Material

There’s a vast array of single vision lens options to choose from. We all have different preferences, so if you’re not sure what to go for, your optician’s advice can always come in handy. They’ll consider factors like the affordability of the material, its benefits, and how well the glasses will serve you in the long run.

Consider Your Lifestyle

Your lifestyle and vision needs are two things that go hand-in-hand. For instance, if you’re farsighted and work in an office all day, you might need reading glasses. There are also single vision computer glasses that protect the eyes during long stretches of looking at a screen. You can always ask your eye doctor to recommend glasses for a specific or intended use.

While these are the important things to think about when choosing single vision glasses, your optometrist or eye doctor will give you a comprehensive list of all the considerations to make. Their expertise can help you make the best selection of optical lenses.

Personalize Your Prescription Glasses

When you need single vision lenses, you’ll notice changes in your vision, especially when it comes to seeing things that are close-up or far away. These lenses will provide clear vision at one distance and accommodate your daily vision needs. They can also protect your eyes from harmful light.

There are choices to make when it comes to your lens materials and options, but that’s not the only part of the eyewear equation. You’ll also need a great pair of frames to go along with your single vision lenses. Start creating a customized look today with Pair Eyewear’s wide selection of Base Frames and Top Frames.

Sources:

Research progress about the effect and prevention of blue light on eyes | PMC

Nearsightedness (Myopia) | National Eye Institute

Farsightedness: What Is Hyperopia? | American Academy of Ophthalmology

Astigmatism - Symptoms & causes | Mayo Clinic