Cataract ou, od, os means what?

Written by Li Zhen Dong

Ophthalmology

Updated on January 20, 2025

00:00

00:00

OU, OD, and OS are common descriptions in ophthalmology. OU represents both eyes, OD represents the right eye, and OS represents the left eye. These are abbreviations. For example, visual acuity for both eyes is denoted as OU, visual acuity for the left eye as OS, and visual acuity for the right eye as OD. These terms are typically used in medical records, not only to describe conditions like cataracts. For instance, the condition of cataracts in both eyes would be described as OU: OD 0.1, OS 0.3.

Other Voices

home-news-image

Written by Deng Jiang Tao

Ophthalmology

1min 5sec

home-news-image

Consequences of not undergoing cataract surgery

First, it is important to understand what cataracts are. Cataracts are the clouding of the lens cortex, which commonly refers to the gradual whitening of the central pupil area, the black part of the eye. Cataracts, based on their stage of development, are divided into early, middle, and late stages. In the early stage of cataract, the vision is slightly impaired. In the middle stage, the cortex becomes moderately clouded, and vision might still be around 0.4 or 0.5. In the late stage, the cataract is severely matured, generally with vision lower than 0.3. Cataract in its early and middle stages might not necessarily require immediate surgery. However, in late stages, when vision drops below 0.3, surgery should be considered. If not treated surgically, the mature cataract can completely block light, progressively decreasing vision and eventually leading to blindness. Therefore, it is advisable to consider surgical treatment for cataracts in the late stage.

home-news-image

Written by Peng Xi Feng

Ophthalmology

50sec

home-news-image

Cataracts are a condition of the eye.

Cataracts are degenerative changes causing a decline in optical quality, which are due to the decreased transparency or color change of a structure in the eye called the lens. The pathogenesis of cataracts is quite complex, resulting from the long-term combined effects of various internal and external factors on the lens. The lens is situated in the fluid environment of the eye, and any factor impacting this environment, such as aging, genetics, metabolic abnormalities, trauma, radiation, poisoning, localized nutritional disorders, as well as certain systemic metabolic or immune diseases, can directly or indirectly damage the tissue structure of the lens, interfere with its normal metabolism, and cause the lens to become opaque.

home-news-image

Written by Li Min

Ophthalmology

46sec

home-news-image

Is cataract easy to treat?

If you are diagnosed with cataracts, we generally use surgical methods nowadays. Our surgical approach typically involves cataract phacoemulsification combined with the implantation of an artificial lens. If you have a simple case of cataracts without any other eye diseases—such as glaucoma, diabetic retinopathy, hypertensive retinopathy, or central retinal vein occlusion—the outcome after surgery is generally good. As for the eye drops for treating cataracts advertised on TV, like Sharp Eye Love, their effectiveness is not very certain in our medical practice. Currently, the main method of treating cataracts is still through surgery.

home-news-image

Written by Hu Shu Fang

Ophthalmology

53sec

home-news-image

What causes cataracts?

There are many factors that cause cataracts, the most common being age-related cataracts. As we age, we are exposed to ultraviolet rays which can cause degeneration of the lens. The older a person is, the more ultraviolet rays they absorb. Some cataracts are also caused by medications, such as long-term use of steroids. Additionally, some cataracts are caused by trauma; if the lens is accidentally punctured during an injury, it can rapidly deteriorate. There are also congenital cataracts caused by intrauterine infections. The causes are various, and in diabetic patients, their cataracts can progress more quickly because high blood sugar can lead to changes in the osmotic pressure of the lens.

home-news-image

Written by Hu Shu Fang

Ophthalmology

36sec

home-news-image

Can cataracts be treated without surgery?

In the early stages of cataracts, if one's vision is still greater than 0.3 and they feel it does not affect daily life, it is possible to initially observe without immediate intervention. If the cataracts have significantly worsened vision and greatly impacted the quality of life, and the severity of the cataracts is considerable, then it is advisable to undergo cataract surgery at an appropriate time. Currently, cataract surgery is very advanced, and the only treatment option for cataracts is surgical intervention, as medication is not very effective.