Sleep is usually a time for restoration and healing, but the way we sleep, how much we sleep and conditions like apnea can increase your chances of developing a serious eye condition: glaucoma.
Glaucoma is a sight-threatening optic nerve disease that generally affects people over 50 and, in its early stages, usually presents no symptoms until permanent vision loss has occurred.
This is why it’s essential to have your annual eye exam, especially if you’re 50 or older or at high risk of developing glaucoma. Regular check-ups enable your eye doctor to detect any eye problems, including glaucoma, early on. This can maximize the effectiveness of eye disease treatment and management.
If you're due for your annual eye evaluation, schedule your eye exam with at in today.
Sleep and Risk Factors for Glaucoma
The quality and amount of our sleep and the way we sleep can increase our risk of developing glaucoma due to the following factors:
Eye Pressure and Glaucoma
The pressure within our eyes is affected by the amount of aqueous fluid and its ability to drain from the eyes. The aqueous fluid doesn’t drain efficiently when we lie flat on our back. The lack of drainage due to positioning during sleep can increase ocular pressure, which can strain the optic nerve and increase the risk of glaucoma.
Blood Pressure and Glaucoma
When we sleep, our blood pressure decreases. This is often good for people who suffer from hypertension because it takes some pressure off the cardiovascular system. However, long periods of low blood pressure, or hypotension, during sleep has been shown to exacerbate glaucoma symptoms.
Sleep Apnea and Glaucoma
Sleep apnea is marked by the occasional or frequent cessation of breathing during sleep. Usually, the person is unaware that they have sleep apnea, and only a partner or someone else who sleeps in the same room will notice that they make choking or gasping sounds as they stop breathing.
These periods of interrupted breathing can lessen the flow of oxygen and damage the optic nerve. There is an observable link between people who have sleep apnea and those who suffer from glaucoma, which may suggest a causal connection. The risk of people with sleep apnea developing glaucoma could be as high as 10 times the average. Individuals with sleep apnea should consult with their primary care physician, who can suggest lifestyle changes and devices such as oral appliances to help treat the condition.
Glaucoma and the Amount of Sleep
Too little or too much sleep can affect general health and contribute to eye problems. As mentioned above, extended periods of lying down can increase pressure on the optic nerve and contribute to the development of glaucoma. Yet too little sleep causes fatigue and has been associated with field vision loss.
According to a National Health and Nutrition Examination Survey (2005-2008), those who slept 10 hours or more a night had triple the risk of developing glaucoma compared to people who slept only 7 hours a night. Getting three hours of sleep a night tripled the risk of field vision loss.
Among other lifestyle glaucoma prevention tips, such as maintaining a healthy weight and not smoking, getting the right amount of sleep — not too much or too little — are important steps towards preventing optic nerve problems.
How Glaucoma Interferes with Sleep
Not only does the amount and way we sleep affect the development and progression of glaucoma. This optic nerve disease can interfere with our sleep. This occurs because the communication between the retina’s photosensitive cells and the hypothalamus — the part of the brain that contains the circadian clock that regulates sleep — is disrupted in glaucoma patients.
The hypothalamus no longer sends a message to the pineal gland to secrete melatonin and induce sleep at the proper time. The result: people with glaucoma may also experience sleep disturbances.
Risk factors for Glaucoma
Since many glaucoma patients do not experience symptoms prior to diagnosis, it is essential to undergo regular eye exams, especially for those considered at higher risk:
- Aged 50 or older
- Have a family history of glaucoma
- Hypertension, diabetes, sickle cell anemia, heart disease
- Are African American, Asian or Hispanic
- Have corneas that thin at the center
- Eye injury or prior eye surgery
- High myopia (severe nearsightedness)
- Take corticosteroids such as eye drops, pills or creams
How is Glaucoma Detected?
A digital eye exam maps out the eye with 3D full color images allowing your eye doctor to detect any problems early.
Retinal imaging can detect glaucoma and show optic nerve damage. Eye dilation is occasionally required before the imaging of the eye to enable your optometrist to more easily see the inside of your eye.
To facilitate the early diagnosis and treatment of glaucoma and other eye diseases and conditions, schedule an appointment with at in today.
At Corktown Eyecare, we put your family's needs first. Talk to us about how we can help you maintain healthy vision. Call us today: 647-694-7600 or book an appointment online to see one of our Toronto eye doctors.
Want to Learn More? Read on!
What are the symptoms of glaucoma?
Symptoms vary depending on the type of glaucoma.
Open-angle glaucoma results from a lack of drainage of fluid from the eye. It generally has no obvious symptoms in its early phases. In its later stages, it presents with:
- Blind spots and patches in the central or peripheral vision
- Tunnel vision
Acute angle-closure glaucoma occurs when there is a sudden buildup of fluid pressure in the aqueous humor. Symptoms include:
- Pain in the eyes
- Blurry vision
- Eye redness
- Appearance of halos
What Causes a Feeling of Pressure Behind the Eye?
Glaucoma is often caused by pressure on the optic nerve. However, a feeling of pressure behind the eye is generally only felt with closed-angle glaucoma.
An excessive amount of fluid in the eye, called the aqueous humor or a sudden blockage to proper drainage causes a buildup and increased pressure on the optic nerve. Drainage of the aqueous humor is through the trabecular meshwork, which is located where the cornea and the iris meet.
Eye Vitamins: Can They Prevent or Treat Glaucoma?
Some initial studies have shown a potential link between Vitamin A and Vitamin C and a protective effect related to glaucoma. However, a systematic review of the literature on vitamins and glaucoma (Nutrients, March 2018), concludes that these studies are inconclusive and more research, including randomized clinical trials, are needed to establish any clear link between specific vitamins and preventing or treating glaucoma.