Table 1 Summary of differences between AS-20 and ASQE
Scale | Subjects | Item and subscale development | Domains or subscales (items) |
|---|---|---|---|
AS-20 | Adults with strabismus | 1. A 181-item questionnaire was first generated on the basis of the patients’ interviews; | Psychosocial (10) |
2. 49 items were left for factor analysis after testing among 29 adult strabismus patients, and 2 factors were isolated: 1st psychosocial functioning and self-awareness and 2nd physical and emotional functions; | Function (10) | ||
3. 10 items with the highest loading were selected for each factor and a final 20-item questionnaire was established referring to Cronbach’s αcoefficient. | |||
ASQE | Adults with amblyopia and strabismus | 1. An inventory of all problems that amblyopia and strabismus patients experienced were collected from outpatients and reduced to 5 domains; | Fear of losing better eye (2) Distance estimation (10) |
2. Then a final questionnaire was established after 26 questions based on these domains were formulated; | Visual disorientation (3) Diplopia (4) | ||
3. These questions were chosen from a pool of situations based on three criteria: 1) the best reflection of restrictions in daily functions; 2) description of only one situation in one question; 3) all interviewees could answer. | Problems with social contact and cosmetic problems (4) |