Post-vitrectomy dry eye: a prospective study of ocular surface changes and associated risk factors.

Inferior conjunctival lissamine green staining and lubricant use increased at one month (p = 0.039 and p = 0.014).

Tear break-up time, superficial punctate keratopathy, and osmolarity did not demonstrate statistically significant changes.

Older age correlated with lower Schirmer values at one month (r = - 0.427, p = 0.006).

In multivariate analysis, operative duration was independently associated with greater SPK scores and lower tear break-up time values.