Statistical analyses were conducted using
the statistical software package IBM SPSS Statistics for Windows Version 19.
Two separate moderated regression models were tested for each indicator of quality of life using the SPSS 17.0
statistical software package; one model tested the moderating role of marital quality in the effects of self - reported (subjective) vision controlling for visual acuity (objective vision) and the second tested the same in the effects of objective vision controlling for subjective vision.