Cataract ou, od, os means what?

Written by Li Zhen Dong

Ophthalmology

Updated on January 20, 2025

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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.

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Written by Wang Hui Zhen

Ophthalmology

1min 1sec

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What are the early symptoms of cataract?

Early symptoms of cataracts are not obvious in some patients, while others may experience mild blurriness of vision. As the lens becomes cloudier, the blurriness will gradually worsen, and symptoms such as nearsightedness, glare, and double vision may also appear. In advanced stages, some may develop glaucoma, leading to symptoms like eye pain, headache, nausea, and vomiting, and in severe cases, it can cause blindness. Cataracts are a common and prevalent eye disease and are the leading cause of blindness worldwide. The lens, an important optical component of the human eye, is normally transparent. Cataracts can form due to various reasons leading to protein degeneration in the lens, causing it to become cloudy and result in various degrees of vision loss. It is recommended that patients with cataracts regularly visit ophthalmologists and consider cataract removal surgery if necessary.

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Written by Li Zhen Dong

Ophthalmology

38sec

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Cataract ou, od, os means what?

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.

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Written by Deng Jiang Tao

Ophthalmology

34sec

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Is vitreous opacity cataract?

Vitreous opacity and cataract are two different concepts; they are two different diseases. Vitreous opacity occurs when the collagen in the vitreous cavity slowly emulsifies into a turbidity. A cataract occurs when the lens inside the human eye becomes cloudy, forming a cataract. These are two completely different diseases, and their treatment methods are generally different as well. Cataract treatment primarily involves surgery, whereas vitreous opacity, including floaters, does not require surgical treatment.

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Written by Peng Xi Feng

Ophthalmology

27sec

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Postoperative complications of cataract surgery

Complications after cataract surgery are relatively common and include the following types: First, incision leakage, leading to a shallow anterior chamber; Second, pupil block; Third, damage to the corneal endothelium, causing persistent corneal edema, and even bullous keratopathy; Fourth, anterior chamber hemorrhage; Fifth, epithelial implantation in the anterior chamber; Sixth, postoperative uveitis; Seventh, increased intraocular pressure; Eighth, abnormal positioning or dislocation of the intraocular lens; Ninth, macular edema, and retinal detachment can also occur.

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Written by Peng Xi Feng

Ophthalmology

59sec

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The main symptoms of cataracts

The main symptoms of cataracts include: First, a decline in vision, which is the most obvious and significant symptom of cataracts. Second, a decrease in contrast sensitivity, particularly noticeable at high spatial frequencies in cataract patients. Third, changes in refractive power. Nuclear cataracts lead to increased lens power due to an increase in the lens and refractive index, causing nuclear myopia. Fourth, monocular diplopia or polyopia due to uneven refractive power across different parts of the lens, similar to the effect of a prism, resulting in monocular diplopia or polyopia. Fifth, glare. Sixth, changes in color perception. Seventh, varying degrees of visual field defects.