Eye Health Info Gallery

Complications in High Myopia

High myopia (short-sightedness) is defined as myopia degree equals to or is greater than six dipoters. In the research of the School of Optometry, The Hong Kong Polytechnic University in 2012, the prevalence of myopia and high myopia in Hong Kong schoolchildren aged 12 was 61.5% and 3.8% respectively. This reflects the problem of myopia in Hong Kong is serious. How does high myopia affect the eyes?

When the myopia is higher, the eyeball is longer. The tissues inside the eyes are stretched when the eyeball elongates and this can induce degeneration and complications. For example, the related degeneration of vitreous and retina can cause retinal breaks and detachment in which symptoms include seeing floaters and flashes. The complications of macular neovascularization, haemorrhages and degeneration can result in blurry and distorted vision. In addition, the prevalence of glaucoma and cataract is greater in high myopia. The risk of these complications is increased with the age and the degree of myopia. Hence, high myopia is regarded as not only the refractive problem, but also the risk factor for the vision-threatening complications.

People of high myopia are suggested to have annual regular eye exam by the optometrists in order to detect any complications as soon as possible. If the symptoms increase or complications occur, more frequent follow-up is needed to monitor the conditions and treatment is required when necessary.


Copyright © 2020 School of Optometry