The HLM-120 portable automatic lensometer from Shanghai LINK Instruments is a compact, versatile tool designed for optical professionals who need accurate, on-the-go lens verification—whether in a clinic, optical shop, mobile vision unit, or field screening setting. Below is a step-by-step guide to using the device effectively:
Step 1: Power On the Device
• Connect the AC adapter or use DC battery mode.
• Press the power button until the screen lights up.
• Allow the device to self‑calibrate for a few seconds.
Step 2: Prepare the Lens
• Clean the lens surface to avoid reading errors.
• Ensure there is no fog, residue, or fingerprints.
Step 3: Position the Lens
• Place the spectacle lens on the lens table.
• Align the lens center with the optical axis.
• Use the wide field‑of‑vision viewer to ensure correct positioning.
Step 4: Adjust for Prism Compensation
• If prism is present, activate the compensation prism function.
• Follow the on‑screen indicator to align the measurement point.
Step 5: Take the Measurement
• Gently move the lens until the measurement target becomes stable.
• The automatic reading function captures sphere, cylinder, and axis.
• The HLM‑120 supports a ±25D measurement range, making it suitable for high prescriptions.
Step 6: Read and Confirm Results
• Check the displayed SPH, CYL, AXIS, and prism values.
• For progressive lenses, slide the lens slowly to detect the near reference point.
Step 7: Measure the Second Lens
• Repeat the same procedure.
• Verify the optical center using the viewer if needed.
Step 8: Power Off and Store
• Turn off the device after use.
• Store it in a dry, shock‑protected case, especially when used for mobile services
For clinics, mobile optometrists, or optical distributors seeking a dependable, certified lensometer, the HLM-120—backed by Shanghai LINK’s ISO 13485, CE, and FDA-compliant manufacturing—offers exceptional value.