Why do myopics like me have a greater chance of retinal detachment?

Longer eye. Myopic eyes are usually longer from front to back, so imagine the internal retina as being more stretched and thin and easier to tear and detach.
Thinner Retinas. Myopes have longer eyes and thinner retinas than the rest of the population. They also have a higher rate of weak spots, called lattice degeneration, which can predispose to retinal detachment. You should get checked regularly by a retina specialist .
Shape of the eyeball. In myopia, the shape of the eyeball causes the image you're viewing to be focused in front of the retina, making it easier to see close objects. This shape also causes the retinal to be more tightly stretched across the back of the eye, increasing the chance that it can detach. This is more of a problem in folks who are severely nearsighted.

Related Questions

Would using a rocking chair a few hours a day if you're highly myopic increase chance of retinal detachment? I have floaters and had flashes once (exam showed I'm fine) but no other risks/known tears.

Retinal detachment. Although high myopia is a risk factor for retinal detachment, rocking in a chair should not increase the risk. Other risk factors for retinal detachment include diabetes, eye trauma, eye surgery, family history and certain eye drops. For most people in their 30s, chair-rocking is not a challenging exercise. If you have special exercise restrictions, your Dr. might list alternatives to rocking. Read more...
No possible way... For a rocking chair to cause a retinal detachment unless some one hits you in the face with it. you are safe to rock away! Read more...

What is myopic retinal detachment?

Myopic detachment. As the eye becomes more elongated with the progression of the myopia, the retina thins and areas of retinal degeneration make the retina more susceptible to detaching. Read more...
See below. Myopic eyes are longer (axial length) and thus the retina is thinner and potentially more at risk for developing retinal tears and holes that can ultimately lead to retinal detachment. Read more...

Is retinal detachment more likely as myopic power goes up in high/extreme myopes?

Usually yes. http://www.mayoclinic.com/health/retinal-detachment/ds00254/dsection=risk-factors an exception would be increasing myopia due to cataract, which does not result in greater axial length of the eye. Read more...
Yes. Myopia is usually associated with increased length from the front to the back of the eye (aka axial length). Increased axial length predisposes to retinal tear and subsequent retinal detachment. Read more...

High myopia of -7 for 2 yr, is there is any chance of retinal detachment? After how much time complications of high myopia generally arises?

Myopia. Most likely were born with the genetics that resulted in myopia. If do the you are at a slight increase risk for retinal detachment. Maybe 1/5000 instead of 1/8000. So all eyes are at risk, with myopia the retina is slightly thinner resulting in a slightly higher risk for a tear that could result in a detachment. Any sudden bright flashes, burst of floaters, or a curtain or veil over your vision. Read more...
No time limit. High myopia has a life long risk of retinal detachment that is higher with personal history of retinal tear or detachment in either eye, the presence of retinal lattice degeneration, family history, the development of a posterior vitreous detachment and with cataract surgery. The last two 'events' occur with age. Risk is present throughout life and as a patient ages. Go to eyemd with symptoms. Read more...

How can I address high myopia and retinal detachment?

Correction/surgery. High myopia can be addressed with glasses, contact lenses, laser vision correction or lens based surgery. Your ophthalmologist can help you decide what the best and safest option is. Retinal detachment can only be treated surgical by a retina specialist. Read more...
A risk factor. One of the risk factors for retinal detachment is severe nearsightedness or myopia. Individuals with this condition tend to have thin retinas with fragile areas that are susceptible to detaching. It is advisable to see an ophthalmologist regularly if you are a high myope. Read more...

Could retinal detachment be caused by severe myopia?

Yes. The retina of a myopic person tends to be thinner and thus more easily torn or detached. Myopic eyes tend to have a higher chance of retinal pathology, like lattice degeneration or atrophic retinal holes, that also put them at risk. So myopia is really a risk factor rather than a cause. Read more...
Yes. One of the risk factors for retinal detachment is severe nearsightedness or myopia. Individuals with this condition tend to have thin retinas with fragile areas that are susceptible to detaching. It is advisable to see an ophthalmologist regularly if you are a high myope. Read more...

What is risk of getting retinal hermorghage or retinal detachment from bungee jumping? I have mild myopia

Ocular Injuries. See "Injuries From Bungee Jumping" at: http://www.livestrong.com/article/382832-injuries-from-bungee-jumping/ ** See: http://onlinelibrary.wiley.com/doi/10.1111/j.1444-0938.1999.tb06642.x/pdf. Read more...
Retinal hemorrhage. This is what I was trying to warn you about. You have anxiety and hypochondria, you should not do a bungee jump. This question is a perfect example. How does nearsightedness predispose you to retinal hemorrhage or retinal detachment. What will make those a higher likelihood is if you strike the ground or water suddenly or if there is a problem with the cord. I hope a responsible adult stops you. Read more...
Retinal detachment. The overall risk of retinal detachment in people with myopia is approximately 5%. Although I could not find stats for this condition developing specifically from bungee, I have linked some references for you to review. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3468282/ https://www.us.elsevierhealth.com/media/us/samplechapters/9781437706031/9781437706031.pdf. Read more...