Table 2

Ocular characteristics of participants in the UK Biobank at baseline visit and at the first repeat visit

Type of eye test	Summary measure	Baseline visit		First repeat visit
Type of eye test	Description	N	Mean±SD/(%)	N	Mean±SD/(%)
Visual acuity	Mean±SD LogMAR in RE	116 068	0.03±0.21	20 162	0.00±0.21
Visual acuity	Mean±SD LogMAR in LE	116 071	0.02±0.21	20 153	0.00±0.22
Refraction	Mean±SD spherical equivalent in RE (D)	114 269	−0.36±2.74	19 505	−0.34±2.86
	Mean±SD spherical equivalent in LE (D)	113 895	−0.30±2.76	19 381	−0.31±2.90
	No of non-myopes (≤−0.50 D)	69 871	60.8	11 636	59
	No (%) of low myopes (≤−2.99 D)*	27 048	23.5	4656	23.6
	No (%) of moderate myopes (≤−3.00 to ≥−5.99 D)*	12 033	10.5	2336	11.8
	No (%) of high myopes (≤−6.00 D)*	5917	5.2	1095	5.6
Ocular Response Analyzer	Mean±SD IOPg in RE (mm Hg)	112 292	15.88±3.97	19 515	16.19±4.28
	Mean±SD IOPg in LE (mm Hg)	111 961	15.74±4.02	19 460	16.05±4.30
	Mean±SD IOPcc in RE (mm Hg)	112 292	16.08±4.35	19 515	16.52±5.05
	Mean±SD IOPcc in LE (mm Hg)	111 962	16.01±4.40	19 460	16.00±4.84
	No (%) of ocular hypertension (IOPg >21 mm Hg)†	14 192	12.5	3182	16.2

*Myopia severity defined from either eye.
†Ocular hypertension defined from either eye.
IOPcc, corneal-compensated intraocular pressure; IOPg, Goldmann-correlated intraocular pressure; LE, left eye; LogMAR, logarithm of the minimum angle of resolution; RE, right eye.