Table 1.

Clinical characteristics of all participants. Key terms: RVA = right visual acuity, LVA = left visual acuity, BEO = both eyes open, NAD = no apparent deviation, LFA = left fully accommodative esotropia, LXT = left exotropia, RET = right esotropia, RXT = right exotropia, LET = left esotropia, L/R = left hypertropia, RLR = right lateral rectus, LMR = left medial rectus, BLR = bilateral lateral rectus, FTR = face turn right, FTL = face turn left, HTL = head tilt left. *Relates to prior surgery or botulinum toxin (BTXA) treatment to the noted eye muscle.

	Age (years)	RVA (logMAR)	LVA (logMAR)	BEO (logMAR)	Cover test	Eye movements	Head posture	Stereopsis (seconds of arc)	Nystagmus type
Nystagmus	39	0.6	0.6	0.6	NAD	–	FTR	300	Jerk right
	19	0.3	0.2	0.2	NAD	–	FTL	85	Pendular
	26	0.5	0.5	0.5	NAD	–	FTR HTL	300	Jerk right
	34	−0.1	−0.1	−0.1	NAD	–	-	170	Jerk left
	38	0.2	0.2	0.2	NAD	–	-	110	Jerk right
	28	0.4	0.4	0.3	NAD	–	-	300	Pendular
	20	0.6	0.6	0.6	NAD	–	-	85	Jerk left
	38	0	0	0	NAD	–	FTL	85	Jerk right
Amblyopia	35	−0.2	0.3	−0.2	LET	–	–	170	–
	49	0.1	0.8	0.1	LXT	–	–	–	–
	25	0.58	0	0	RET	–	–	–	–
	43	0.2	−0.2	−0.2	RXT	−1 RLR*	–	–	–
	34	0.3	−0.1	−0.2	RXT	−0.5 LMR*	–	–	–
	36	−0.1	0.5	−0.1	LET	−2 LMR*	–	–	–
	25	0	0.8	0	LET L/R	−1 Left Elevation*	–	–	–
	36	0.3	−0.1	−0.1	RET	–	–	–	–
	33	1	0	0	LET	−1 BLR*	–	–	–
	46	0	0.8	0	LXT	–	–	–	–
Control	36	0	0	0	NAD	–	–	55	–
	34	0	0	0	NAD	–	–	55	–
	28	0	0	0	NAD	–	–	55	–
	27	−0.1	−0.1	−0.1	NAD	–	–	85	–
	26	0	−0.1	−0.2	NAD	–	–	85	–
	39	−0.2	−0.2	−0.2	NAD	–	–	85	–
	21	−0.1	−0.1	−0.1	NAD	–	—	85	–
	41	0.1	0.1	0.1	NAD	–	–	85	–
	29	0	−0.1	−0.2	NAD	–	–	85	–
	40	−0.2	−0.2	−0.2	NAD	–	–	85	–