Table 1: Various instruments/tools/questionnaires available to measure QOL

Tools for assessment of QOL		Examples
1. Generic/general health instruments		• Sickness impact profile (SIP) • Medical outcomes study short form-36 (SF-36) • MOS-20
a. Utility measures		• Time trade-off • Thermometer • Choice-based conjoint analysis
2. Specific instruments
a. Vision-specific instruments		• The national eye institute visual function questionnaire (NEI-VFQ) 51 item and (NEI VFQ-25) 25 item • Activities of daily vision scale (ADVS) • VF-14 • VAQ
b. Glaucoma-specific instruments		• Glaucoma symptom scale (GSS) • Glaucoma quality of life-15 (GQL-15) • Viswanathan et al • SIG (symptom impact glaucoma score) • GHPI (Glaucoma health perceptions index)
c. Treatment-specific instruments		• Comparison of ophthalmic medication for tolerability (COMTOL)