A-Scan Biometry黎明科技，在线查档，社工查询，社工库，全网最低价，欢迎老板光临 https://t.me/limingkj888 http://www.dlsgno.me/ 人肉搜索 开盒 挂人 出道 查档 查户籍 查全户 户籍查询 身份证查询 查身份证 查开房 开房记录查询 查同住 同住人查询 查流水 银行流水查询 手机定位 实时定位 轨迹查询 通话记录查询 短信内容查询 查快递 收货地址查询 查个人信息 个人资料查询 查车主 车主信息查询 学籍查询 查征信 背景调查 信息查询 数据调查 社工库查询 SGK 信息泄露 数据泄露 暗网数据 内部数据 一手数据
A-Scan Biometry is a diagnostic technique used in ophthalmology to measure the length of the eye and assess the anterior chamber depth, corneal thickness, and lens thickness. The primary application of A-scan biometry is in the measurement of the axial length of the eye, which is crucial for the calculation of the intraocular lens (IOL) power required for cataract surgery. It is also useful for diagnosing and managing conditions that affect the size and shape of the eye, such as myopia (nearsightedness), hyperopia (farsightedness), and
A-scan biometry provides precise measurements that help ophthalmologists determine the best surgical approach, particularly in planning cataract surgery and refractive surgery like LASIK.
glaucoma.
How A-Scan Biometry Works
The A-scan uses ultrasound technology to measure the distance between the front and back of the eye. During the procedure, an ultrasonic probe is placed on the surface of the anesthetized eye, sending high-frequency sound waves into the eye. The sound waves are reflected by various internal structures of the eye, such as the cornea, lens, and retina, and the time it takes for the echoes to return is recorded. The device then calculates the axial length based on the speed of sound in tissue and the time it takes for the sound waves to return.
Preparation:
- The patient is usually given topical anesthetic drops to numb the eye and make the procedure comfortable.
Probe Placement:
- A small, handheld probe is gently placed against the eye, usually with a coupling gel to reduce any discomfort.
Sound Wave Emission:
- The probe sends out ultrasonic sound waves, which travel through the eye and bounce back upon hitting the various structures within the eye.
Measurement Calculation:
- The time it takes for the echoes to return is measured, and the system calculates the axial length and other necessary measurements like corneal thickness and anterior chamber depth.
Results:
- The results are displayed on a screen as numerical values for various eye measurements. These include axial length, anterior chamber depth, and lens thickness, which are used for IOL power calculation in cataract surgery.