Occlusion Therapy (Patching)
Patching or blurring one eye to quiet double vision, or to treat amblyopia in children when the stronger eye needs a timeout.
Occlusion therapy is the low-tech fix that still earns its keep: cover or blur one eye so the brain stops receiving two competing images. For adults, it is often used to calm binocular double vision while a nerve palsy recovers or while a more permanent plan is being sorted out. For children, patching the stronger eye can treat amblyopia by forcing the weaker eye to work.
Key Takeaways
- Can quickly stop binocular double vision by blocking one image
- Simple and non-surgical, though not always elegant
- Useful when prisms are not enough or the deviation is changing
- Often temporary while waiting for recovery or surgery planning
- Amblyopia patching is different and usually follows a pediatric eye doctor's schedule
When It's Used
For Double Vision
- Acute cranial nerve palsies while waiting for recovery
- Large deviations that are too big for prism glasses
- Variable deviations where the amount of double vision changes through the day
- Short-term symptom control before a surgery decision
For Amblyopia
- The stronger eye is patched
- The weaker eye is forced to practice
- Most effective in childhood; adult occlusion is usually for symptom control, not vision development
Types of Occlusion
Patch
Adhesive patches block the eye completely and are straightforward for short-term double vision or pediatric amblyopia. Skin irritation is the usual nuisance.
Frosted Lens
A glasses lens can be frosted or taped so the eye stays open but the image is blurred. It looks less medical than a patch and works well for many adults with diplopia.
Bangerter Foil
This translucent filter sticks onto a glasses lens and comes in different blur strengths. Handy when total blackout is more than you need.
Cloth Patch
Reusable cloth patches are comfortable for some people, though they can let in side light or press awkwardly against the lashes. Fit matters when a patch is worn for long periods.
Considerations
Choosing Which Eye
For double vision, many people patch whichever eye gives the most comfortable result. For amblyopia, the stronger eye is patched according to a prescribed schedule. Your doctor should spell this out; guessing can cause problems, especially in children.
Driving
Do not assume patching and driving are compatible. One-eye vision removes normal depth perception and cuts the visual field. Local rules vary, and adaptation takes time. Ask before you drive.
Adjustment Period
Expect clumsiness at first: bumping door frames, misjudging curbs, pouring coffee not quite into the cup. That usually improves, but reduced peripheral vision and depth perception remain part of the deal.
Duration
For Acute Palsies
- Temporary until recovery
- Or until surgery
- May transition to prisms
Long-Term
- Some people use indefinitely
- If surgery not desired or not possible