The HD Analyzer provides an objective measurement of vision quality. Understanding of vision quality and the root cause of loss of quality is an important first step in determining the best treatment option for the patient. Patients who would benefit from this measurement include:
All new patients: Establish baseline for optical quality and tear film analysis. Diagnose early cataracts and asymptomatic dry eye.
Patients who complain about vision quality: Understand and measure vision quality, diagnose early cataracts. Diagnose dry eye when it affects vision quality.
Cataract surgery candidates: Diagnose early cataracts. Help educate patients about the health of their lens.
Dry Eye Candidates: Screen all patients with vision quality complaints for dry eye. Educate patients about the health of their tear film.
Refractive or RLE surgery candidates: Determine whether lens or cornea based procedures would best benefit the patient.
The HD Analyzer is the only device that measures ocular light scatter.
Due to their technologies, wavefront aberrometers like the iTrace do not account for light scatter. Consequently, they overestimate the optical quality of the patient’s eye. The HD Analyzer is the only diagnostic tool that directly measures total vision quality without extrapolation.
If your patient’s glasses are clean, clear, and the prescription is up to date, they can keep them on during the exams. Be sure to enter the patient’s subjective refractive information correctly before you take measurements, and select “total correction” from the drop down menu before measuring objective refraction.
If the patient has dirty, scratched, missing, or out of date glasses, use the following guide to correct refractive error while using the HD Analyzer:
Sphere within (+5/-8 D) and Cyl 0.50D or less:
Do not use any external correction, enter the Rx, click “No Correction”, and go.
Sphere within (+5/-8 D) but Cyl above 0.50D:
Place trial lens for Cyl correction only into a trial frame, enter the Rx, click “Astig Correction”, and go.
Sphere beyond (+5/-8D) with any Cyl:
Use trial lenses in trial frame, enter the Rx, click “Total Correction”, and go.
If you receive an “error 50” message, first ensure that refractive error is corrected properly. Ensure that the correction type (“No Correction”, “Astig. Correction”, or “Total Correction”) has been selected from the drop down menu in the measurement screen.
If this does not resolve the problem, contact our support department here.