Methods of vision examination in Zhongshan Ophthalmology Department
Vision is the ability of people to see the details of objects clearly. In daily life, vision inspection is very important. As a professional eye hospital, Zhongshan Ophthalmology Department provides a variety of vision examination methods to help people accurately understand their own vision. The following four aspects will be described in detail: diopter examination, visual acuity chart examination, fundus examination and corneal topography examination.
Diopter test
Diopter test is a common visual inspection method. The degree of myopia, hyperopia and astigmatism can be evaluated by measuring the ocular diopter. The main tool for diopter inspection is the automatic refractometer. The patient only needs to look at the target in front of his eyes through the aperture placed in front of his eyes, and then the refractometer will measure the degree of vision.
The diopter test is mainly divided into "naked eye vision measurement" and "corrected vision measurement". The former is to allow patients to test without wearing any vision correction tools, while the latter requires patients to wear appropriate glasses or contact lenses for testing. By comparing the two methods, doctors can determine the true diopter of the patient's eyes.
The diopter test is the first step for Zhongshan Ophthalmology Department to check the vision, which can help doctors understand the vision problems of patients and take corresponding treatment measures.
Visual acuity chart examination
Visual acuity chart is a common method of vision test. This method usually uses an eye chart that conforms to international standards, such as Spitz type eye chart or ETDRS eye chart. The patient was asked to sit at a certain distance and read the letters on the vision chart one by one. As the letters decrease, the tester can determine the patient's vision range.
The visual acuity chart can help doctors quickly and accurately assess the vision of patients. According to the smallest letter that the patient can read, the doctor can give the corresponding vision degree. This method is simple and applicable to people of all ages.
It should be noted that the visual acuity chart can only assess the patient's quasi optical vision, that is, the clarity that the patient can see under ideal lighting conditions. It can not provide specific information about the ocular diopter, so it is necessary to conduct a comprehensive assessment in combination with other methods such as diopter examination when diagnosing vision problems.
Fundus examination
Fundus examination is a method to evaluate the fundus condition of patients. Zhongshan Ophthalmology Department adopts a variety of fundus imaging equipment such as master station type and scanning type, such as non-contact fundus camera and optical collimation fundus scanner. These devices can help doctors find and evaluate various eye diseases by photographing the blood vessel network and retina behind the eyes of patients.
Fundus examination can help doctors understand patients' retinal status, vascular supply and potential eye disease risks. This method is very important for the prevention and early detection of eye diseases, especially the diagnosis and treatment of diabetic retinopathy, macular degeneration and other eye diseases.
Fundus examination can help doctors develop personalized treatment plans and reduce the risk of vision loss of patients by assessing the fundus conditions of patients.
Corneal topography
Corneal topography is a method to evaluate corneal curvature and shape. It uses professional corneal topographic mapping instruments to measure the patient's eyeball, and can obtain three-dimensional information of the cornea.
Corneal topography can help doctors evaluate the curvature of the eye and determine whether there are corneal diseases, such as keratitis, corneal dystrophy, etc. At the same time, it can also evaluate the shape of the cornea, such as the use of corneal plastic lenses or the effect before and after corneal transplantation.
Corneal topography examination is one of the advanced technologies provided by Zhongshan Ophthalmology Department, which can help doctors accurately grasp the state of patients' eyeballs and provide a strong basis for eye disease treatment.
Summary
Zhongshan Ophthalmology Department provides a variety of vision examination methods, including diopter examination, visual acuity chart examination, fundus examination and corneal topography examination. Through these examination means, the hospital can accurately assess the vision of patients, so as to develop personalized treatment plans. Vision examination is an important means to protect eye health. We should check regularly to find and deal with existing problems in a timely manner.
