Practice lab
Practice Lensometer.
Read a simulated target, compare the principal meridians, and record common single-vision prescriptions—one clear step at a time.
See the patternThen record the lens.
How this simulation works
- 1. Read the first focus. It gives the sphere starting point.
- 2. Compare the second focus. The difference tells you the cylinder power.
- 3. Use the dial. Record the aligned cylinder axis, then check your reasoning.
Scenario 1 of 5
Session score: 0
Simulated lensometer view
Exam-practice viewFocus+2.00
090270180000- First focus
- +2.00 D
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