TABLE 7.

Refractions identified for the 16 metric optimisations and the three additional refractive conditions (habitual, autorefraction [autoref] and theoretical lower-order zeroing [LOAZ]) with corresponding average relative acuity for the five control observers.

Condition	Average relative acuity (logMAR)	Sphere (D)	Cylinder (D)	Axis (degrees)
HABITUAL	−0.54	+0.50	−1.75	20
AUTOREF	−0.37	−2.25	−1.50	30
NS	−0.24	−1.75	−1.25	40
SROTF	−0.20	−1.00	−2.25	42
PFCT	−0.19	−1.50	−1.25	42
LIB	−0.14	−1.75	−1.00	48
SRMTF	−0.14	−1.75	−1.00	48
SRX	−0.14	−1.75	−1.00	48
STD	−0.14	−1.75	−1.00	48
VSOTF	−0.14	−1.75	−1.00	48
PFST	−0.12	−1.5	−1.25	38
VSX	−0.12	−1.75	−1.25	44
AREAOTF	−0.11	−1.75	−1.00	50
LOAZ	−0.11
ENT	−0.11	−1.75	−1.25	36
PFCC	−0.10	−1.50	−1.50	44
PFWC	−0.10	−1.50	−1.50	44
VSMTF	−0.10	−1.75	−1.25	42
AREAMTF	−0.08	−1.75	−1.00	46

Note: The 16 metric optimisations listed here are neural sharpness (NS), Strehl ratio for optical transfer function (SROTF), pupil fraction for curvature tessellation (PFCT), light in the bucket (LIB), Strehl ratio for modulation transfer function (SRMTF), Strehl ratio in space domain (SRX), standard deviation of intensity (STD), visual Strehl ratio for optical transfer function (VSOTF), pupil fraction for slope tessellation (PFST), visual Strehl in space domain (VSX), area of visibility for optical transfer function (AREAOTF), entropy (ENT), pupil fraction for curvature critical pupil (PFCC), pupil fraction for wavefront critical pupil (PFWC), visual Strehl ratio for modulation transfer function (VSMTF) and area of visibility for modulation transfer function (AREAMTF). Data from Ravikumar et al.60