Coats Disease is a rare eye condition affecting the retina, predominantly in children and young adults. Early detection and treatment are critical in managing this condition and preserving vision. Find a top optometrist or ophthalmologist near you for expert guidance and care.
Coats disease is a rare eye condition that affects the blood vessels in the retina, the light-sensitive layer at the back of the eye. It usually happens in children and young adults, often in just one eye, and can lead to vision problems if not treated early. Understanding this condition can help families spot signs sooner and get the right care to protect vision.
This condition involves abnormal blood vessels in the retina that leak fluid, fats, and proteins, causing swelling or detachment. It is important for parents and caregivers to know about it because early detection can make a big difference in preserving a child’s eyesight.
Coats disease most often shows up in childhood or adolescence, with diagnosis often occurring before the age of 10. It tends to affect boys more than girls, with males being three times more likely to develop the condition. Most cases, over 95%, affect only one eye, though rarely both eyes can be involved.
The exact cause of Coats disease remains unknown, but experts believe it involves a problem with how small retinal blood vessels develop. These vessels become weak, abnormal, and start leaking. It is not inherited from parents, not caused by injury or infection, and not linked to lifestyle choices.
In healthy eyes, retinal blood vessels have tight walls that keep fluid inside. With Coats disease, these vessel walls become weak and allow fluid to escape. This leaked fluid contains cholesterol and other substances that can form yellow deposits in the retina, which can disrupt the retina's ability to process light signals and distort vision.
Coats disease progresses through five main stages, starting with mild vessel changes and potentially advancing to complete retinal detachment. Early stages may show little vision loss, while advanced stages can cause significant problems and even blindness in the affected eye. Regular eye exams can help catch it before it progresses.

Spotting the early signs of Coats disease can lead to quicker treatment and better outcomes. Symptoms often appear gradually and may be subtle at first, so it is important to pay attention to any changes in a child's vision or eye appearance.
Children with Coats disease often experience blurry or cloudy vision in the affected eye. They may have trouble seeing details, reading small print, or recognizing faces from a distance. Some kids notice their side vision becomes limited, while others may see flashing lights or floating spots.
One of the most noticeable signs is a white or yellowish glow in the pupil, especially visible in flash photos, known as leukocoria. This abnormal reflection happens because light bounces off the fluid and deposits in the retina. Parents may also notice that their child’s eye turns inward or outward, a condition called strabismus.
Kids with Coats disease might start tilting their head to see better or moving closer to objects they want to look at. They may bump into things on one side or have trouble with activities that require good depth perception, like catching a ball. School performance might decline if the child struggles to see the board or read.
If your child complains of vision problems, seems to have trouble seeing from one eye, or shows a white pupil in photos, schedule an eye exam right away. Early symptoms might be mistaken for other issues, like lazy eye, so a thorough retinal exam by a specialist is needed for proper diagnosis.
Diagnosing Coats disease requires specialized eye exams to examine the retina and its blood vessels in detail. These tests are safe and painless, helping retina specialists confirm the condition and determine the best treatment plan.
The doctor will start with a complete eye exam, using eye drops to dilate the pupils to see the retina clearly. This allows them to spot any leaking vessels, fluid buildup, or yellow deposits that suggest Coats disease. This exam also helps rule out other conditions.
Fluorescein angiography involves injecting a harmless dye into a vein and taking special photographs as it flows through the eye's blood vessels, showing exactly which vessels are leaking. Optical coherence tomography (OCT) uses light waves to create detailed cross-sectional images of the retina, showing fluid buildup and retinal thickness to track changes over time.
Ultrasound of the eye may be used when the retina cannot be seen clearly due to bleeding or dense deposits. This test uses sound waves to create images and can detect retinal detachment. Blood tests or genetic testing may be recommended to rule out other conditions that cause similar symptoms.
Coats disease can sometimes look similar to retinoblastoma, a type of childhood eye tumor, which is why careful diagnostic testing is essential. A combination of imaging and a thorough examination allows a specialist to distinguish between these two very different conditions and ensure the right treatment is chosen.

Treatments for Coats disease focus on stopping blood vessel leakage and preventing further retinal damage. The best approach depends on the stage of the disease, with earlier treatment generally leading to better outcomes.
Laser treatment uses focused light beams to seal off abnormal blood vessels and stop them from leaking. The procedure is typically done in the office using numbing drops and works best for early-stage disease. Multiple treatment sessions may be needed.
This treatment uses a special probe that applies extreme cold to freeze and destroy leaky blood vessels, particularly those at the edges of the retina that are hard to reach with a laser. The procedure may be done under local or general anesthesia.
These medications are injected directly into the eye to reduce fluid leakage and swelling. While not a cure, these injections can help control symptoms and are often used alongside other treatments like laser or cryotherapy. Multiple injections are usually needed.
For advanced cases with retinal detachment, surgery may be necessary to reattach the retina. Vitrectomy surgery involves removing fluid and scar tissue from inside the eye, while scleral buckling places a band around the eye to support the detached retina. These are performed in a hospital under general anesthesia.
With proper medical care and family support, many children with Coats disease adapt well and continue to participate fully in life. Understanding how to manage daily challenges and maintain overall eye health is important for long-term success.
Children with vision changes may benefit from classroom accommodations. Inform the school so they can provide support.
Glasses may help maximize remaining vision, but low-vision aids are often more effective. These tools help children maintain independence and can include magnifiers, special lighting, or electronic devices for reading and detailed work.
Most children with Coats disease can continue participating in sports with some precautions. Protective eyewear is highly recommended for contact sports or any activity with a risk of eye injury to protect the healthy eye. An active lifestyle should be encouraged.
Dealing with a vision condition can be challenging. Open communication and a positive outlook are key. Consider connecting with support groups or counseling services if your child struggles with emotional adjustment to vision changes.
If you suspect your child may have Coats disease or if they're experiencing vision issues, reach out to a qualified eye care specialist listed with Specialty Vision. Early diagnosis and treatment are key to preserving your child's vision and ensuring they receive the best care possible.

Coats disease requires specialized care from retina experts, but with proper treatment and support, children can thrive and enjoy fulfilling lives. If you have concerns about your child's vision or eye health, do not hesitate to seek professional evaluation and guidance from qualified eye care specialists.

If you suspect your child may have Coats disease or if they're experiencing vision issues, reach out to a qualified eye care specialist listed with Specialty Vision. Early diagnosis and treatment are key to preserving your child's vision and ensuring they receive the best care possible.
Coats Disease affects retinal blood vessels, often in children. Early detection is crucial—find a specialist to protect your child's vision.