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By Dr. Roderic W. Gillilan, OD

When seeing motion makes you sick

Nausea, headaches, dizziness, or fatigue triggered by everyday visual motion — and the drug-free therapy developed to treat it.

Learn about SSS
The SEE Sick Syndrome (SSS) is a condition in which seeing motion or eye movement produces symptoms such as nausea, headaches, dizziness, and fatigue. Patients are often extra sensitive to light. The condition was first successfully treated in 1965 and is the focus of Dynamic Adaptive Vision Therapy (DAVT), a drug-free treatment approach provided as a public service.

What sets SSS apart

SSS is triggered by the act of seeing motion and eye movement, affecting routine activities many people take for granted.

Symptom Profile

Nausea, headaches, dizziness, and fatigue — often paired with heightened light sensitivity.

Common Triggers

Riding in a car, shopping, reading, using a computer or smartphone, exercising, or watching movies.

Drug-Free Therapy

Dynamic Adaptive Vision Therapy (DAVT) is offered as a public-service approach to treatment.

How DAVT works

Dynamic Adaptive Vision Therapy follows a structured path that mirrors the effort and progress curve of physical therapy.

1

Diagnose

Rule out labyrinthine or neurologic abnormalities and confirm the visual-motion pattern of SSS.

2

Train

Follow a personalized DAVT program with clearly defined goals, regular sessions, and family support.

3

Recover

Build tolerance to visual motion so everyday activities — driving, reading, screens — become comfortable again.

Care paths

Choose the level of support that fits your situation. All paths use the DAVT protocol.

Self-Training

Independent practice at home

Follow the published DAVT protocol on your own, using the FAQ and patient letters as a guide.

Family-Supported

Training with a helper

Family involvement is encouraged — helpers make sessions easier and help maintain consistency.

What patients report

Excerpts from post-therapy letters submitted by SSS patients.

★★★★★

Relief from symptoms

“Relief from nausea, headache, dizziness, and fatigue after completing the DAVT program.”

— SSS patient testimonial

★★★★★

Outdoor life restored

“Improved ability to enjoy light, outdoor activities, and travel that were previously difficult.”

— SSS patient testimonial

★★★★★

Self-trained success

“Success stories from patients who completed the program on their own without professional assistance.”

— Do-it-yourself SSS patient

Frequently asked questions

What triggers SSS symptoms?

Seeing motion or eye movement — for example, while riding in a car, shopping, reading, using a computer or smartphone, exercising, or watching movies. Light sensitivity often accompanies these triggers.

What is DAVT?

Dynamic Adaptive Vision Therapy is a drug-free treatment approach described as a public-service cure for SSS. Progress and effort are similar to physical therapy.

How are sessions structured?

Training follows defined goals with recommended frequency and session length. Family support is encouraged to make sessions easier and more effective.

How is SSS diagnosed?

Diagnosis involves ruling out labyrinthine or neurologic abnormalities and confirming the visual-motion symptom pattern described by Dr. Roderic W. Gillilan.

Ready to take the next step?

Explore SSS in depth or find a provider familiar with the DAVT protocol.

About SSS Find a Provider

About Dr. Roderic W. Gillilan, OD

Dr. Gillilan received his Doctor of Optometry degree from Pacific University College of Optometry in 1956. He practiced optometry in the US Army from 1956 to 1958 and in private practice in Eugene, Oregon, from 1958 through 2000. He discovered the SEE Sick Syndrome and successfully treated his first SSS patient in 1965, going on to train several hundred patients through 2000. In 1985, he conducted a motion-sickness research project involving 1,250 high school subjects in Eugene, OR.

His publications include The Gillilan SEE Sick Syndrome article (Oregon Optometry, 1979), The Optometric Management of Motion Sickness (1984), and the peer-reviewed Vision Therapy as A Treatment for Motion Sickness (Journal of the American Optometric Association, 1986).