Table 1.
Search strategy in Medline (Ovid)
| Search term | Hits | |
| 1 | exp CHILD/ | 1129108 |
| 2 | exp INFANT/ | 692510 |
| 3 | (baby or babies or newborn or neonat$).mp. | 536032 |
| 4 | exp schools/ | 49523 |
| 5 | exp CHILD-HEALTH-SERVICES/ | 14438 |
| 6 | exp CHILD-DAY-CARE-CENTERS/ | 3371 |
| 7 | (CHILD$ or ADOLESC$ or JUVENILE$ or MINOR$ or SCHOOL$ or KINDER-GARTEN$ or PRE?SCHOOL$ or NURSER$).ti. | 529317 |
| 8 | (CHILD$ or ADOLESC$ or JUVENILE$ or MINOR$ or SCHOOL$ or KINDER-GARTEN$ or PRE?SCHOOL$ or NURSER$).ab. | 640000 |
| 9 | 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 | 2031820 |
| 10 | exp strabismus/ | 9863 |
| 11 | exp amblyopia/ | 4081 |
| 12 | exp REFRACTIVE-ERRORS/ | 17635 |
| 13 | ((EYE$ or SIGHT$ or VI-SION$ or VISUAL$) adj4 (PROBLEM$ or DEFECT$ or IMPAIR$ or DEFICI$ or REDUC$)).mp. [mp = ti, ot, ab, nm, hw] | 24836 |
| 14 | (LAZY adj EYE$).mp. [mp = ti, ot, ab, nm, hw] | 14 |
| 15 | (AMBLYOPI$ or SQUINT$ or STRABISM$ or ANISO-METROPI$ or MYOPI$ or HYPERMETROPI$ or ASTIGMATI$ or AM-METROPI$ or HYPER-OPI$).mp. [mp = ti, ot, ab, nm, hw] | 32219 |
| 16 | cataract$.mp. | 40130 |
| 17 | microtropia.mp. | 75 |
| 18 | glaucoma.mp. | 36328 |
| 19 | retinoblastoma.mp. | 14353 |
| 20 | ((heredit$ or retinal or macular) and dystroph$).mp. | 5741 |
| 21 | refract$.mp. [mp = ti, ot, ab, nm, hw] | 77398 |
| 22 | exp vision, low/ | 936 |
| 23 | (SPECTACLES or GLASSES).mp. | 4495 |
| 24 | exp Cataract/ | 16513 |
| 25 | 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 | 208688 |
| 26 | (test or tests or testing).mp. | 1383219 |
| 27 | examination$.mp. | 424043 |
| 28 | ophthalmoscop$.mp. | 9356 |
| 29 | photoscreen$.mp. | 95 |
| 30 | (acuity or red reflex).mp. | 46057 |
| 31 | exp Vision Tests/or exp Visual Acuity/ | 52117 |
| 32 | exp Ophthalmoscopy/ | 5116 |
| 33 | (vision or visual).mp. | 246181 |
| 34 | (test$ or screen$).mp. | 2011737 |
| 35 | 33 and 34 | 58712 |
| 36 | (Hirschberg or Bruckner or motil$ or funduscop$ or cyclopleg$ or skiascop$).mp. [mp = ti, ot, ab, nm, hw] | 67108 |
| 37 | (Auto?refract$ or random?dot or stereoacuity or Snellen or Sheridan-Gardiner).mp. [mp = ti, ot, ab, nm, hw] | 2475 |
| 38 | (Cover?uncover or Alternate cover or Corneal reflex or PhotoScreener or Visiscreen).mp. [mp = ti, ot, ab, nm, hw] | 330 |
| 39 | (Retinomax or Suresight).mp. [mp = ti, ot, ab, nm, hw] | 39 |
| 40 | 26 or 27 or 28 or 29 or 30 or 31 or 32 or 35 or 36 or 37 or 38 or 39 | 1844319 |
| 41 | exp "Sensitivity and Specificity | 211681 |
| 42 | exp Diagnosis/ | 3862053 |
| 43 | diagnos$.mp. | 1268941 |
| 44 | sensitiv$.mp. | 743123 |
| 45 | predict$.mp. | 485857 |
| 46 | accura$.mp. | 238100 |
| 47 | 41 or 42 or 43 or 44 or 45 or 46 | 5133424 |
| 48 | 9 and 25 and 40 and 47 | 9851 |
| 49 | exp Contact Lenses/ | 8117 |
| 50 | exp Eyeglasses/ | 4478 |
| 51 | (refractive adj correct$).ti. | 29 |
| 52 | (refractive adj correct$).ab. | 316 |
| 53 | ((optic$ or vision$ or visual$ or filter$ or lens$ or glass$ or spectacle$) adj3 (occlusion or penali$ or patch$)).ti. | 129 |
| 54 | ((optic$ or vision$ or visual$ or filter$ or lens$ or glass$ or spectacle$) adj3 (occlusion or penali$ or patch$)).ab. | 671 |
| 55 | 49 or 50 or 51 or 52 or 53 or 54 | 12865 |
| 56 | exp clinical trials/ | 190907 |
| 57 | exp research design/ | 212573 |
| 58 | comparative study/or placebos.mp. | 1341575 |
| 59 | exp treatment outcome/ | 283315 |
| 60 | double-blind method/or single-blind method/ | 98869 |
| 61 | ((single or double or triple) adj blind$3).ti. | 20568 |
| 62 | ((single or double or triple) adj blind$3).ab. | 78020 |
| 63 | random$.ti. | 56160 |
| 64 | random$.ab. | 364411 |
| 65 | controlled clinical trial.pt. | 73779 |
| 66 | clinical trial.pt. | 450604 |
| 67 | (clinical adj trial$1).ti. | 25698 |
| 68 | (clinical adj trial$1).ab. | 90789 |
| 69 | (control$3 adj trial$1).ti. | 15725 |
| 70 | (control$3 adj trial$1).ab. | 38465 |
| 71 | randomized controlled trial.pt. | 228874 |
| 72 | exp RANDOM ALLOCATION/ | 57826 |
| 73 | exp PROSPECTIVE STUDIES/ | 213531 |
| 74 | exp Follow-Up Studies/ | 332322 |
| 75 | 56 or 57 or 58 or 59 or 60 or 61 or 62 or 63 or 64 or 65 or 66 or 67 or 68 or 69 or 70 or 71 or 72 or 73 or 74 | 2474586 |
| 76 | 9 and 25 and 55 and 75 | 633 |
| 77 | 9 and 25 and 55 | 1765 |
| 78 | screen$.mp. | 287728 |
| 79 | exp Neonatal Screening/ | 3723 |
| 80 | exp VISION TESTS/ | 19699 |
| 81 | exp MASS SCREENING/ | 77069 |
| 82 | 78 or 79 or 80 or 81 | 309225 |
| 83 | 9 and 25 and 82 | 4644 |
| 84 | 48 or 76 or 83 | 10737 |
| 85 | 48 or 77 or 83 | 11540 |
| 86 | (animals not human).sh. | 4025575 |
| 87 | 85 not 86 | 11140 |