20-year (Mar 2010–Feb 2012) | 27-year (Jun 2016–Dec 2018) | 28-year (Apr 2018–Apr 2020) | |
Questionnaire | √ | √ | √ |
Visual acuity | √ | √† | √† |
Vernier acuity | √ | ||
Contrast sensitivity | √ | ||
Colour vision | √ | ||
Orthoptic assessment* | √ | ||
Pre-cycloplegic autorefraction | √ | √ | √ |
Spectacle lens measurement | √ | √† | √† |
Eyelid position photography | √ | ||
CUVAF photography | √ | √ | √ |
Eye colour photography | √ | √ | √ |
Ocular biometry | √ | √ | √ |
Eyelash length measurement | √ | ||
Tonometry | √ | √ | |
Mydriasis | √ | √†‡ | |
Fundus photography | √ | √†‡ | |
Retinal tomography | √ | ||
OCT | √ | √‡ | |
OCT-A | √‡ | ||
Specular microscopy | √ | ||
Anterior segment topography | √ | √ | |
Cycloplegic autorefraction | √ | √ |
*Includes cover test, ocular motility, stereoacuity, and tests for ocular dominance, nystagmus and microtropia (four dioptre prism test).
†Performed using different equipment from the 20-year follow-up.
‡Performed while awaiting full pupil dilation after instillation of mydriatics.
CUVAF, conjunctival ultraviolet autofluorescence; OCT, optical coherence tomography; OCT-A, optical coherence tomography angiography.