Comparison of Methods to Detect and Measure Glaucomatous Visual Field Progression.

For locations with a negative trend, the following formula was applied: y = e ( a+bx ) , where y is the threshold sensitivity (dB), a is the constant, b is the slope (regression coefficient), and x is the time (years).

also in 4,201 other papers

For locations with a positive trend, the following formula was used: Y−y = e ( a+bx ) , where Y is the normal age-matched threshold sensitivity + 2SD, y is the threshold sensitivity (dB), a is the constant, b is the slope, x is the time (years).

also in 11,005 other papers