Acaster, S., Verboven, Y., Begley, C., Chalmers, R., Abetz, L. and Thompson, T. ORCID: 0000-0001-9880-782X (2011) PSS32 Impact of dry eye on everyday life (Ideel) - Symptom bother: Estimating cut-off scores for dry eye severity groups. Value in Health, 14 (7). A507-A508. ISSN 1098-3015 (Print), 1524-4733 (Online) (doi:https://doi.org/10.1016/j.jval.2011.08.1497)