I’m sure you’re here because you have a pair of binoculars with double vision.
This happens when the two lenses are not aligned properly, and so they give a blurry, doubled image.
Don’t worry; it’s an easy fix. You’ll be able to see things once again in no time at all.
A few days ago, I was looking at the sky and saw two stars instead of one.
It turns out that my binoculars had double vision. I tried to fix it myself but couldn’t find any solution.
Fortunately, after a lot of research on the internet, I found some helpful information, which I am going to share with you here.
Are you ready to find out some easy ways how to fix binoculars with double vision?
What is the primary function of binocular vision?
If you are a beginner in binoculars, the first thing you should know is that binocular vision is a critical aspect of outdoor activities.
Binoculars allow us to see more things at the same time, which can be helpful when we’re hunting for animals or looking for landmarks.
In simple words, Binoculars vision helps the user see things more effectively.
The function of the two lenses in binoculars is to create an image of the object at a distance.
When the lenses are not aligned correctly, the user will experience double vision or a blurry image.
Unfortunately, Double vision is the main symptom of a problem with binoculars.
Why am I seeing double through my binoculars?
Have you ever experienced double vision or a blurry image when you look through your binoculars?
I can remember the day when I first experienced double vision.
I can understand the irritation when it happens accidentally, but when the problem is with your binoculars, it becomes more frustrating.
Let me explain the reason to you in the below part.
What causes double vision in binoculars?
Now, you might be thinking, “Why do my binoculars have double vision?” Sometimes people think their bino pair got damaged when double images appear and throw it away.
Please, don’t do this. This is not the case most of the time. Indeed, many of us are not familiar with double vision problems.
There could be a few reasons your binoculars give you double vision.
In general, double vision is caused by asymmetry in the optics inside the eyepieces.
The two eyepieces are mirror images of each other and must match up perfectly to provide seamless viewing.
If they don’t, there will be a double image that appears as if one lens is right next to the other lens (like looking into a funhouse mirror).
It’s important to note that double vision can also be caused by using a pair of glasses that aren’t designed for binoculars, usage errors while focusing and collimation (adjustment) of your binoculars, incorrect alignment between camera tripod and optics on microscope head, etc.
Most of the time, the problem is with one of the lenses.
How to fix binoculars with double vision?
Well, Above, I have tried to explain the reason behind double vision in binoculars.
Now, I know you are desperately looking for a solution. So, here are some of the easiest ways to fix double vision in binoculars:
Tools and Materials:
- Any optical alignment tool (adjustable eyepiece, prism collimation tools)
- A pen knife (If necessary)
- Moist cloth
1) Read The User Manual
First and foremost, make sure you have properly read the user manual that came with your binoculars.
This will help you understand the basics of how to focus and align the eyepieces.
2) Remove The Casing
If the problem is with one of the lenses, you’ll need to take it apart and clean it.
Remove the casing by unscrewing the screws on each side.
Once you have access to the lenses, use a screwdriver to remove them either manually or using an alignment tool (if available).
3) Check The Lens Focusing Mechanism
The lens focusing mechanism can malfunction if your double vision is caused by asymmetry in optics inside eyepieces.
To check, first, focus both eyepieces on an object at arm’s length and make sure that the image is in focus.
If the left eyepiece appears blurry, the lens focusing mechanism might be the culprit. To correct this, rotate the lens until both images are in focus.
Close your left eye, hold the right eyepiece over the left eye, and screw on the left lens.
Now focus on an object in front of you that is close to your line of sight (about six inches away).
If the image from the right eyepiece appears blurry, unscrew both lenses again and clean them with a damp cloth. Repeat these steps for the other lens.
4) Adjust The Eyepieces’ Positions
If you’re using binoculars that came with a prism collimation tool, you can use it to adjust the eyepieces’ positions so that they are symmetrical and in alignment with each other.
5) Check the Balance of the Binoculars
As I told you before, there are many reasons behind double vision problems.
If the problem is with binocular balance, you’ll need to adjust it by tightening or loosening the tripod screws.
6) Clean the Binoculars
Another important thing you must do. If the lenses are dirty, you’ll need to clean them using a damp cloth.
Make sure that the lenses are completely dry before screwing them back on. Check out this guide on how to use binoculars with glasses.
7) Screw Back
Finally, screw back the lenses and enjoy your new binoculars with double vision free.
The symptoms listed above can also be solved with a simple adjustment. If you don’t want to buy new binoculars, try checking the front and back lenses first.
Then make some small adjustments on the side lens or the entire binoculars if necessary.
You will be able to see clearly without any issues after performing all the steps mentioned above.
Did you face double vision with your present binoculars? Share your solution on how to fix binoculars with double vision in the comments section below.