Double Vision in Children

In today's blog we are going to talk about double vision. The most common cause of double vision is that the eyes are misaligned, which then causes two different images to be sent to the brain. Typically, the images are either side by side or overlapping.

When I have a student comes into our office for an assessment, one of my first questions is, "do you ever see two of whatever you are looking at?" And when they say "yes", it is almost like they are wondering, "How on earth did this lady know?"

When I am sitting in the room with just the parents discussing the assessment results and I tell them “your child has double vision,” often those parents feel terrible or guilty for not knowing. I have had parents in my office with tears in their eyes saying, "you must think I am the worst mother."

Of course, these parents aren’t awful at all! Let's break it down; a child is not aware that what they are seeing is abnormal. Therefore, they are unable to communicate their double vision to their parents--children think everyone sees the world as they do. It is not uncommon for parents to be unaware of their child's double vision.

If you suspect your child may have double vision, here are some signs to look out for:

• Reading problems
• Skipping or repeating words
• Overlapping letters when writing 
• Lots of headaches
• Poor depth perception

The good news is, we can treat double vision through vision therapy and/or prism lenses. Since the problem is that the eyes are misaligned we can help alleviate the issue by getting to work on eye teaming exercises.

While hearing your child having double vision is alarming, there are solutions!

Treatment Tools

Meet Duke, an American Pit Bull Terrier. He is going to help us model each treatment lens we use here at Nashville Vision Therapy. Thanks, Duke!

To start us off, Duke is demonstrating his focusing abilities and anticipating a tracking exercises. He gets a little bored of just focusing and following a eyeball, so he decided to show us some fancy treatment tools our office uses during Vision Therapy.


Here we go...

Why is Duke wearing 4 lenses? Great question! These are called accommodative flippers. These lenses are used to improve the flexibility and strength of a patient’s focusing system. We use these with the Hart (letter) Chart, when reading, and when we use a tool called Aperture Rule. There are minus lenses on one side, and plus lenses on the other. The word "flipper" comes in handy because you flip the lenses back and forth while doing certain exercises to improve the focusing system.

Harry Potter is that you? No, it's just Duke wearing prisms! I could go on and on about prisms. We use them all the time, kids think they are so fun!  

"Prisms create total "eye-mind-body” changes and improved perception of depth and space.  Prism produces changes in orientation with corresponding shifts in both eye movement and pelvic positions. They are a valuable tool in breaking down patterns that have developed over time that enable the patient to cope with their visual condition." 

Here is a great article about prisms, which includes examples on how to use prisms in Vision Therapy exercises. Take a look: http://www.oepf.org/sites/default/files/22-5-FOX.pdf.


Duke circa 1970. These red/green (or can use red/blue lenses) lenses help us use both eyes together. Using these red/green lenses, allows us to see if a patient is suppressing the visual input from one eye.

When using these lenses we use a transparent film with red/ green stripes. We place this film over reading materials, hidden pictures, mazes, or letter charts. When doing the exercises you have to use both eyes enable to see the whole image. If you are not using both eyes, parts of the picture will be missing.


Each one of these tools helps the visual system work more efficiently. What do you think? Which lens have you used during therapy, and with what exercises? Have questions? Email us at VT@rdeyes.com.