Table 2. Medical and family history of eye diseases among study participants.
| Count | Column N % | ||
| Had a history of allergy | Yes | 207 | 41.6% |
| No | 291 | 58.4% | |
| Type of allergy: | |||
| Skin allergy | 64 | 12.8% | |
| Nasal allergy | 98 | 19.7% | |
| Chest allergy | 61 | 12.2% | |
| Eye allergy | 62 | 12.4% | |
| Gastrointestinal tract allergy | 26 | 5.2% | |
| Food and/or antibiotics allergy | 2 | 0.4% | |
| Urticaria | 2 | 0.4% | |
| Had a refractive error or any condition that affects the eye? | Yes | 238 | 47.8% |
| No | 260 | 52.2% | |
| What is the disorder? | |||
| Myopia/hypermetropia | 144 | 28.9% | |
| Previous refractive surgery | 44 | 8.8% | |
| Keratoconus | 20 | 4.0% | |
| Astigmatism | 8 | 1.6% | |
| Prescription glasses | 2 | 0.4% | |
| Previous eye surgery | 16 | 3.3% | |
| Using contact lenses | 41 | 8.2% | |
| Amblyopia | 19 | 3.8% | |
| Others | 11 | 2.2% | |
| Family history of keratoconus | Yes | 119 | 23.9% |
| No | 379 | 76.1% | |