Visual Field Testing for Glaucoma and Other Diseases

Published on
May 4, 2022

Visual field testing can be done in a variety of ways. It is an important tool for glaucoma and other eye conditions which can cause damage to the visual field.

How does a visual field test work?

A visual field test can be something as simple as an eye doctor's screening test during an eye examination. They can also perform a threshold visual field test. In general, they try to find any particular areas of visual field, which is loss of some of your peripheral vision. This involves looking straight ahead at a target on the test, and then telling them, usually using a button, if you notice an object to the side or the periphery. It's a quick and simple screening test. Basically, they want you to be able to see most of the objects in your peripheral vision. They may extend the test if they see you missed a few objects on your side. This enables them to determine if either eye has any potential vision issues. Each eye is examined separately, so as to avoid any overlap.

What conditions can cause visual field defects?

There are a number of conditions that can cause specific types of visual field defects:

Hemianopsia: Certain types of traumatic brain injuries can lead to a loss of visual field, for instance if you suffered a stroke, you may suffer from a condition called hemianopsia, in which each eye misses one side of the field. If you have hemianopsia, you can see only one side of someone's face when looking directly at them and you won't be able to see the other side of their face unless they move into the field of view you can see. 

Glaucoma: Glaucoma and other conditions can also cause visual field loss, although you might not notice it right away. If it progresses or advances, it starts to tunnel in or close in. Usually an eye doctor can spot certain patterns early on, such as where a nerve has died off and where a visual field has deteriorated.

Diabetic retinopathy: If you have diabetic retinopathy, you can have scotomas which are basically patches or areas of vision where you can not see well. A lot of times in the treatment of proliferative diabetic retinopathy, where now you get a lot of new vessels that are now so weak that they're bleeding. And when you do that, they do a laser procedure on the eye, or on the retina. Which then prevents any further vision loss, but while the laser does what it is supposed to do, it also disrupts the retina as well which can cause you to have some residual visual field loss.

Amblyopia (lazy eye): There are many conditions that can cause visual field loss, one of the most common ones is lazy eye or amblyopia. If you have amblyopia, otherwise known as lazy eye, where the brain favors one of your eyes, it does not mean you don't see at all in your periphery, but it may impact your full field of vision. There may be some difficulty in seeing the periphery as well as someone without amblyopia, since the brain is relying on vision of one eye. This doesn't always mean you're going to have issues but in some cases it can cause functional vision problems on the side of your weaker eye. 


Other conditions that cause loss of visual fields: There are other conditions that can impact peripheral vision, which is why we screen all patients to detect any visual field deficits. Some of those conditions include high blood pressure, age related macular degeneration, Multiple sclerosis, tumors of the optic nerve, degenerative myopia, cataracts, stargardt, nutritional deficits, and exposure to toxins. 

Schedule an eye exam at Amplify EyeCare of Greater Long Beach 

If you are concerned about potential loss of visual field, please call our office to schedule an eye exam at (562) 925-6591. Our office, located in Bellflower, is equipped with advanced technology to diagnose a wide range of conditions that can cause field loss. As a specialty center, our doctors have advanced training and certifications in low vision and neuro optometric rehabilitation, which enables us to provide a holistic approach to treatment for any cause of field loss.


I haven't actually used the optometrist side, so my review is limited to the vision therapy offered.  This office was recommended by my occupational therapist for the treatment of my double vision following a stroke.

Claire A.

Love this location. I had a brain injury accident from day one one. All the team make you feel you still important and hope in the horizon after when the medical system fell you miserably. Dr. Ikeda very professional and very understanding about your issue. Two tombs up.

Jim K.

My husband and I were immediately impressed with Dr Ikeda. I was hit by a car while cycling which caused broken bones and three brain injuries. The brain injuries caused double vision. Dr. Ikeda examined my eyes and got me started on vision therapy with his occupational therapist who specializes in vision therapy.  She (Chris) is absolutely great.  I am impressed with the array of tools used to help recover my binocular vision.  I am doing things I never thought were possible (balance boards etc).  Chris pushes me and keeps me motivated. I really enjoy my sessions with her.  The office staff is always friendly and they have a wonderful appointment reminder tool that makes it easy to keep my calendar up to date. I am happy the rehab center at Little Co. of Mary recommended them!!

Teresa S.

The Vision Therapy is handled in a separate office through a different door from the shared waiting room. Chris, the vision therapist, has a wide and varied assortment of tools, equipment and resources to best evaluate and treat most vision issues. After just a few visits, my double vision became easier to control, using exercises developed during the therapy process. It was time well-spent.

Joe M.

I have been coming here since I can remember. I love it here. The staff is so amazing and nice. They explain everything they gonna do and never make you feel rushed. Dr. Ikeda has always been my doctor and I would never want another one. He is the doctor for my whole family and is always asking how everyone is doing. I am also so crazy about picking out my frames and have to try so many and each person who helps me take the time and lets me try them all on. I would never want to go anywhere else! I definitely would recommend this office to anyone looking for a great eye doctor.

Kayla W.

This is not for the eye exam but for the frames selection portion. I brought my prescription from Kaiser here with my VSP insurance. The reception staff was very polite and professional.  Manny helped me to pick out frames and explain my coverage.  Very helpful and patient not like the individual at the other place I rated here on Yelp.  I was running late and he still helped me and was not bothered at all.  I am so glad I came here ..........very pleased.

Very professional staff and pleasant.

Daniel G.
1 2 3



Understanding Foggy vision

Is foggy vision troubling you? Let our experienced optometrist restore your sight – book an appointment today and see the […]

Read More

Vision Therapy for Nystagmus: Improving Visual Function and Quality of Life

According to the National Eye Institute, nystagmus affects approximately 0.24% of the general population in the United States. This means […]

Read More

Cleaning Your Eyelids With Hypochlorous Acid: The Ultimate Solution for Eyelid Infections and Inflammation From Blepharitis

Are you tired of dealing with eyelid inflammation? Well, there's good news for you! Hypochlorous acid, a natural bactericidal compound, […]

Read More
see all blogs

Contact Us To Amplify Your EyeCare

Amplify EyeCare of Greater Long Beach Logo

Working Hours

Monday & Wednesday

Tuesday & Thursday

By appointment only

Friday & Sunday



16816 Clark Ave, Bellflower, CA 90706
(562) 867-8719
Website Accessibility Policy
Safety protocols page
privacy policy
Cancellation Policy
For Patients
Call Us
For Patients
Call Us
eyefile-adduserphone-handsetcalendar-fullarrow-uparrow-right linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram