Which feature is associated with the Bailey-Lovie chart but not described for ETDRS in the material?

Which feature is associated with the Bailey-Lovie chart but not described for ETDRS in the material?

• A. Has high and low contrast letters on opposite sides of the chart
• B. Uses a logarithmic progression
• C. Is calibrated at 4 meters only
• D. Has 8 letters per line

Answer: (A)

The feature being tested is the ability of the Bailey-Lovie chart to present letters at high and low contrast on opposite sides of the chart. This dual-contrast layout lets a clinician assess acuity under two contrast levels within one chart. In the material, ETDRS is described as a high-contrast, single-contrast chart, so the dual-contrast side-by-side design is not described for ETDRS. That makes this feature unique to Bailey-Lovie and the best choice. The other aspects—using a logMAR progression—are common to both charts, so they don’t differentiate Bailey-Lovie from ETDRS in this context.

The feature being tested is the ability of the Bailey-Lovie chart to present letters at high and low contrast on opposite sides of the chart. This dual-contrast layout lets a clinician assess acuity under two contrast levels within one chart. In the material, ETDRS is described as a high-contrast, single-contrast chart, so the dual-contrast side-by-side design is not described for ETDRS. That makes this feature unique to Bailey-Lovie and the best choice.

The other aspects—using a logMAR progression—are common to both charts, so they don’t differentiate Bailey-Lovie from ETDRS in this context.