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Table 7 Table for calculating the E&F classification based on the results of both scales of the Keratoconus End-Points Assessment Questionnaire (KEPAQ)

From: Standardizing the measurement and classification of quality of life using the Keratoconus End-Points Assessment Questionnaire (KEPAQ): the ABCDEF keratoconus classification

Grade Emotional sub-scale (E) Functional sub-scale (F)
1 ≥ 74.27 ≥ 69.14
2 59.15–74.26 54.71–69.13
3 43.91–59.14 36.64–54.70
4 ≤ 43.90 ≤ 36.63