Guangzhou Zhongshan Ophthalmology Department: What are the indicators of vision examination?
Vision examination is an important means for ophthalmologists to evaluate people's visual health. As a professional ophthalmic hospital, Guangzhou Zhongshan Ophthalmology Department provides comprehensive vision examination services. In the visual examination, the ophthalmologist will evaluate the visual function of the patient according to multiple indicators. The following will elaborate on the indicators of vision examination from four aspects: vision, diopter, intraocular pressure and fundus.
vision
Vision is one of the core indicators for evaluating eye health. In visual inspection, doctors usually use an eye chart to measure the far vision and near vision of patients. Vision is usually expressed in the form of a fraction, such as 20/20, which indicates the size of the letters that the patient can see at a distance of 20 feet, which is the same as normal vision. If the patient's vision is not up to standard, the doctor will further check whether it needs correction, such as glasses or contact lenses.
In addition, doctors will also carry out other relevant visual function tests, such as visual field examination and binocular visual coordination examination, to comprehensively assess the visual function of patients.
Diopter
Refraction refers to the ability of the eye to refract light, and it is also one of the commonly used indicators in visual inspection. The doctor will use an automatic optometer or a hand-held optometer to measure the patient's ocular refraction to determine whether there are myopia, hyperopia, astigmatism and other refractive abnormalities. These data will help doctors to correctly match glasses or contact lenses.
Abnormal diopter may lead to blurred vision or eye fatigue. Therefore, the evaluation of diopter is very important in visual inspection.
Intraocular pressure
Intraocular pressure (iop) is the fluid pressure in the eyeball, which is also one of the important indicators to evaluate eye health. High intraocular pressure may be a risk factor for glaucoma, while low intraocular pressure may be a risk factor for retinal detachment. Therefore, doctors will use special equipment to measure patients' intraocular pressure, so as to detect and treat potential eye problems as soon as possible.
The intraocular pressure test is usually painless. The doctor will drop some anesthetic eyedrops on the cornea, and then use a special instrument to measure the intraocular pressure.
the fundus oculi
Fundus examination is an important examination used to evaluate the health of eyes, and it is also an important part of vision examination. By observing the fundus blood vessels, macular area, optic nerve and other parts, doctors can understand the patient's eye conditions, such as whether there is fundus hemorrhage, retinal detachment, macular degeneration and other diseases. Fundus examination usually requires the use of special instruments, such as ophthalmoscope or excimer laser scanner.
Fundus examination is a very important examination item, which can help doctors find and diagnose eye diseases as early as possible and provide effective guidance for treatment.
Summary
Vision examination is an important means to assess eye health. Guangzhou Zhongshan Ophthalmology Department provides comprehensive vision examination services for patients. Vision, diopter, intraocular pressure and fundus are commonly used indicators in visual inspection. By evaluating these indicators, doctors can fully understand the patient's visual function and eye conditions, and identify and treat potential eye problems as soon as possible. It is suggested that people should have their eyesight checked regularly to protect the health of their eyes.
