Normal Result on Jaeger Chart
Normal near vision on a Jaeger chart is J1 or J2, which corresponds to the ability to read small print (equivalent to newspaper or book text) at the standard testing distance of 14-16 inches (35-40 centimeters). 1
Understanding Jaeger Chart Results
The Jaeger chart measures near visual acuity using progressively smaller text paragraphs numbered from J1 (smallest) to J16 or higher (largest). 1
Normal Values
- J1: Represents the smallest print size, equivalent to 20/20 distance vision at near 1
- J2: Also considered normal, representing slightly larger but still excellent near vision 1
- Most individuals with normal vision can read J1 or J2 comfortably at the standard 14-16 inch testing distance 1, 2
Critical Testing Parameters
When documenting Jaeger chart results, the following must be specified for accurate interpretation: 2
- Testing distance: Should be standardized at 14-16 inches (35-40 centimeters) 1, 2
- Reading add power: Document any reading glasses or bifocal addition used during testing 2
- Monocular vs binocular: Specify whether each eye was tested separately or together 2
- Chart type: Note the specific Jaeger chart version used for reproducibility 2
Clinical Context
The Jaeger chart should not be used as the sole measure of functional near vision ability. 1 While it provides a standardized measurement, real-world reading performance depends on multiple factors including contrast sensitivity, lighting conditions, and sustained reading ability over time. 1
For comprehensive near vision assessment, the American Academy of Ophthalmology recommends using high-contrast charts with standardized optotypes at specified distances. 1 The Jaeger chart, while widely used clinically, has limitations compared to more standardized near vision tests that use consistent optotype sizing and spacing. 1