How to test for presbyopia

Generally, presbyopia can be detected through daily observation and professional examinations. Common methods include near-reading tests, self-assessment of accommodation function, trial wearing of reading glasses, standard visual acuity chart testing, and slit-lamp examination. Detailed analysis is as follows:

1. Near-reading test: Take a newspaper, book, or text on a mobile phone and hold it at the normal reading distance of 30–40 cm. If the text appears blurry, you need to squint to see clearly, instinctively move the material farther away to read it, or experience eye strain, dryness, headaches, or other discomforts, this may indicate the presence of presbyopia.

2. Accommodation self-test: First, fix your gaze on a stationary object 5 meters away for 30 seconds, then quickly shift your focus to the tip of a pen held 15 cm in front of your eyes. If your vision remains blurry for more than 2 seconds before focusing, or if eye discomfort and double vision occur after repeated shifting, this suggests reduced accommodative ability, consistent with signs of presbyopia.

3. Trial wearing of reading glasses: Prepare ready-made reading glasses with different dioptric powers. Hold a reading material at close range and try reading while wearing each pair of glasses sequentially. If the text becomes clear and undistorted at a distance of 30 cm with a certain lens, and no eye fatigue occurs after wearing it for 5 minutes, that lens power can serve as a preliminary reference, indirectly confirming the presence of presbyopia.

4. Standard visual acuity chart test: Use an ophthalmology-specific near-vision chart, stand 30 cm away from the chart, and identify the characters without wearing glasses. If you can clearly read the line marked 1.0 or higher, your near vision is normal. If you can only clearly see the 0.5–0.8 lines, or must shorten the viewing distance to read them, the corresponding values can help estimate the degree of presbyopia.

5. Slit-lamp examination: Using specialized ophthalmic equipment to examine the lens, this method reveals decreased lens elasticity and reduced refractive power—typical changes in presbyopia. The slit lamp clearly shows these alterations and simultaneously rules out other eye conditions such as cataracts or fundus diseases that could cause blurred vision, ensuring accurate diagnosis.

Presbyopia is a natural manifestation of age-related physiological decline. Once confirmed through testing, appropriate reading glasses can be worn based on the required correction. To reduce eye discomfort associated with presbyopia, avoid prolonged near-work, and take breaks every 40 minutes by looking into the distance to relax the eyes.