Binoculars may open up a whole new universe to see, whether you’re looking at the sky or the mountains.

However, while you’re wearing glasses, it can be difficult to get everything into focus without straining your eyes. The good news is that there are a few things you can do to help you see everything clearly, even when you’re wearing glasses.

In this post, we’ll walk you through the most useful tips when using binoculars with glasses and getting back to enjoying them!

But first, do you need to wear glasses with binoculars?

The answer is No. You can change each eye individually to fit the precise diopter you might need to utilize binoculars without wearing glasses thanks to ocular lens diopter adjustment.

If for whatever reason, you choose to wear glasses when using binoculars or may be required to do so owing to certain medical conditions, this article is going to cover all the possible scenarios to help you through.

There are a number of drawbacks when using binoculars with glasses

The drawbacks of using binoculars with glasses

This is an important point that I must make because, for a few reasons that I will describe below, using binoculars and glasses while viewing may not be ideal:

Key highlights when using binoculars with glasses (Full guide)

There are a few things to think about when using binoculars with glasses:

Uses of Glasses

It’s crucial to consider your eyeglass’s intended use when using binoculars with them. 

using binoculars with glasses
Source: Eyerim

Far/Nearsightedness

You probably have farsighted or nearsighted eyesight if you struggle with near or far vision. You don’t need to wear your glasses when using your binoculars with glasses if you have this condition. Focus on your binoculars because they allow you to fix your vision by adjusting the diopter and center adjustments. This implies that you have the option to completely give up your spectacles.

However, the likelihood is that you will be looking very far if you were really interested in hunting, birdwatching, or any other hobby that calls for binoculars. You should therefore wear your glasses while engaging in your activity. This is more crucial when birding because you need to locate a bird from a distance before using your binoculars to zoom in. Farsightedness will prevent you from being able to do it.

Binocular & Astigmatism 

The condition known as astigmatism refers to an irregular curvature of the eye’s lens or cornea. When this occurs, light rays that enter the eyes are not sufficiently refracted, causing an image to become distorted or hazy. Prescription glasses can treat astigmatism, which causes headaches and strain in the eyes.

While nearsightedness and farsightedness can both be treated with diopter correction, hazy and distorted pictures cannot. Because you wouldn’t want to view distorted images of your favorite birds or animals, binoculars require the use of glasses.

Length of eye relief

You might now be curious as to what eye relief is. The distance between your eyes and the internal objective lens of the binoculars is known as eye relief. This length is crucial since it affects whether or not you see hazy images. This is especially crucial for you if you wear spectacles because, when using binoculars, your glasses’ lens will take up some of the space.

As a general guideline, you should have an eye relief of at least 16mm if you wear glasses. Actually, most people who wear glasses require a longer eye relief than that.

Kind Of Eye Relief Cups

The kind of eye relief cups on your binoculars affects how comfortable it is for someone wearing glasses to use them.

There are currently just two designs available, binoculars with fixed focus designs and twist-up designs.

Fixed-focus designs: Older, probably less expensive binoculars include a fixed-focus design with just basic rubber cups that can be folded down to reduce the eye relief distance.

If you can observe your image clearly without any hazy edges or moving black shadows at the corners of the screen, then these types of binoculars are ideal as they are.

Twist-up design: Recently, a new design—a twist-up style of eyecup—has been added to improve the contemporary design of binoculars.

This design appeals to me personally since it is slick and makes sense when you want the flexibility and simplicity to change to your needs. Several stops on some eye cups ‘click’ at predetermined lengths.

I still prefer the one I use and recommend, which has twist-up eyecups but no “click” stops, despite the fact that some people would like it.

Source: Knive and tools

Roof or Porro prism

A prism is often composed of glass in optics. This glass is made up of (at least) two smooth faces that are at sharp angles, which produce spectral colors for light absorption and dispersion. BAK4 glass prisms, which enhance light refraction, are typically used in the construction of optical equipment.

The purpose of the prism is to expand the passage of light from the binoculars’ objective lens to the eyepiece lens while keeping the optical device’s actual tube length constant.

Prisms are typically used in binoculars and come in two types:

Porro Prism

Two prisms are positioned at a right angle to one another to form a Porro prism. Since the eyepiece and objective lenses are not lined up, light entering the binoculars must pass sporadically through the prisms.

The suitability of usage with glasses is not directly affected by the type of prism, but it may have an indirect effect. This is due to the fact that most Porro prism binoculars include foldable eyecups are not always the greatest choice for people wearing glasses.

The Porro prism binoculars’ outstanding dusk performance and an expansive field of view are two of their top features. However, they are heavy to transport because of their complicated physical makeup. Furthermore, it may be difficult to locate Porro prism binoculars with waterproofing capabilities; as a result, they may not survive as long as roof prism binoculars.

Roof Prism

Roof Prism binoculars are available in a variety of designs with two prisms that are joined in various ways. The objective lens and eyepiece lens of roof prism binoculars are aligned, which gives the binoculars its distinctive straight tube. They are lightweight and feature a simple physical design.

Binoculars made by Roof Prism offer better waterproofing capabilities. Additionally, they contain twist-up eyecups, which are ideal for those who wear glasses. However, they can be more expensive, have a smaller field of view, and have less light transmission than Porro prism binoculars.

Size of Lens

The diameter of the lens is measured at its outermost point. It establishes how wide the lens will be. Because sufficient eye relief is simpler to accomplish with larger lenses, it is crucial to examine the lens diameter of the binoculars you’re about to purchase.

Compact and pocket-sized binoculars are more convenient to purchase, but because they typically have limited eye relief, they aren’t the ideal option for anyone wearing eyeglasses.

Additionally, there are binoculars with smaller lenses that can also provide sufficient eye relief, but they are also on the pricey side. However, binoculars with more long eye relief are more expensive.

Source: REI

How to setup binoculars with glasses

Step 1: Twist or fold your eyecups downward.

If you wear glasses, you already have enough eye relief since the length of the eye relief is increased by the distance between your eye and the spectacles. So there’s no need to spread them out.

Step 2: Put on your glasses and peer through your binoculars.

Make sure you do not see anything when using your binoculars while wearing your glasses.

Step 3: Examine the vignetting.

When using a pair of binoculars, vignetting is the blacking out of an image’s edges. When the eye relief distance is too close together, it occurs. When this occurs, you must extend the eyecups until the black rings around the edges cease developing, which indicates that the relief distance is enough.

Vignetting is evident when there are hazy black margins. If your image is clear, the edges should appear sharp.

You can check the guide on how to use binoculars with glasses on the link Youtube below.

Conclusion

Every moment is valuable, and you wouldn’t want to miss any whether you go camping, fishing, birdwatching, stargazing, trekking, or when you’re at the stadium watching your favorite players. No matter how far you are from the action, binoculars are necessary to see crucial moments.

You need not worry if you wear glasses because you can use binoculars with them; just pay great attention to the features of the binoculars you intend to purchase.

This is a general guideline for those who wear glasses: you cannot emphasize enough how vital appropriate eye relief is. You don’t want your image to have black circles around the perimeter or to not have the entire field of view. Therefore, it is essential to purchase binoculars with an increased eye relief of at least 16mm.

Additionally, eyeglass wearers should use twist-up eyecups, which are typically found with roof prism binoculars. This is so that you may get up to five distinct positions and because they are simpler to change. Additionally, a larger lens diameter is advised since it makes achieving optimum eye relief simple.