Laboratory work 7: Determining visual acuity
The Golovin chart is a chart in which letters or symbols get smaller row by row. The work is done in pairs under teacher supervision. The chart is hung on a well-lit wall and the subject stands 5 metres from it. The subject covers one eye with a palm or clean paper without pressing (do not press the eye) and with the other names the letters from top to bottom; the tester points with a pointer. The lowest row read without mistakes shows visual acuity: row 10 – 1.0, row 9 – 0.9 and so on. No conclusions about the eyes or vision are drawn: this is a classroom learning exercise, not a diagnosis. Rest the eyes after the experiment. If any pupil cannot see the board or the chart well, they should tell their parents and see an eye doctor; a vision defect is nothing to be ashamed of and glasses easily correct it.
Report table: pupil letter (A, B, not names), which eye, row, result. Note the 5 m distance and the lighting. Conclusion: how acuity was determined and what it depends on (light, distance, fatigue).