What is an Air Puff Tonometer? Uses and Troubleshooting Guide
Introduction In an eye exam, the air puff tonometer—formally known as a Non-Contact Tonometer (NCT)—is used to screen for glaucoma by measuring Intraocular Pressure (IOP).. For optometrists, ophthalmologists, and clinic managers, keeping this machine running accurately is essential for patient safety and clinic flow. At Shanghai Link, we understand that the reliability of your Ophthalmic […]
Best Eye Exam Machines: Top Ophthalmic Equipment Guide 2026
Understanding the specific function of each eye exam machine is crucial for optimizing clinical workflows. This blog outlines key instruments used in comprehensive eye examinations, highlighting the latest technologies from industry-leading companies such as Shanghai LINK, iCare, and Optomap. What Equipment is Used During an Eye Exam? For practitioners in hospitals, optical labs, and private […]
Shanghai Link Instruments Co., Ltd. to Exhibit at the 24th China (Shanghai) International Optics Fair
Shanghai, China – March 2–4, 2026 – Shanghai Link Instruments Co., Ltd. is excited to announce its participation in the 24th China (Shanghai) International Optics Fair, taking place from March 2 to 4, 2026, at the Shanghai New International Expo Centre. With a focus on cutting-edge ophthalmic equipment, Shanghai Link Instruments Co., Ltd. will showcase […]
Manual Phoropter vs. Auto Phoropter: Which is Better
A phoropter is the main tool used to check a patient’s prescription. It is usually either manual or automatic. Both types do the same basic job—measuring refractive error to find the right lenses. But manual and auto phoropter differ significantly in operation, features, and suitability. This article compares these two types of phoropters, helping you […]
What Equipment Do Optometrists Use? A Comprehensive Overview
Optometrists rely on a combination of diagnostic, examination, and optical measurement equipment to evaluate vision, detect eye conditions, and determine corrective prescriptions. Common tools include refractors for vision, slit lamps for detailed eye health checks, tonometers for glaucoma screening, fundus cameras for retinal imaging, and visual field testers for peripheral vision assessment. What Equipment Do […]
Top 6 things to check before buying a Manual Phoropter for your new clinic
Opening a new optometry clinic or upgrading your exam room is a significant investment. While digital phoropters are gaining traction, the Manual Phoropter remains the “gold standard” for many practitioners due to its reliability, tactile feedback, and independence from software glitches.To ensure your investment delivers optimal performance and reliability, consider these 6 key factors before […]
How to Choose Lens Edger Machine for Eyewear Shops
For any eyewear shop, optical boutique, or small finishing lab, choosing a lens edger isn’t just about buying equipment—it’s about securing the “engine room” of your optical practice. To put it plainly, this machine is the difference between paying a lab bill and keeping that profit in-house. The 2025 landscape has shifted rapidly towards automation […]
How to Use Ultrasound Machine: Practical Guide for Eye-Care Pros
What an Ophthalmic Ultrasound Machine Is Designed to Do? Ophthalmic ultrasound machine is a diagnostic imaging tool primarily used for two purposes: measuring the length of the eye for cataract surgery (A-Scan) and visualizing the back of the eye when the view is blocked by cataracts or blood (B-Scan). Typical clinical applications include: Retinal detachment […]
What is a Tonometer and How Does it Work？
What is a Tonometer? The tonometer is a medical device used to measure intraocular pressure (IOP), to screen for and monitor serious conditions like glaucoma, where high IOP can damage the optic nerve. Tonometers work by gently flattening the cornea (applanation) or using a puff of air (non-contact) to gauge this internal pressure, helping doctors […]
How the Goldmann Applanation Tonometer Works: Principle and Applications
Accurate intraocular pressure (IOP) measurement is essential for diagnosing and managing glaucoma. Devices like the Shanghai Link Tonometer, based on the Goldmann Applanation Tonometer (GAT) principle, provide precise and reliable IOP readings. This article explains the GAT working principle and its clinical applications. What Is the Goldmann Applanation Tonometer? Tonometry is an eye test that […]
