Age	Normal vision and eye movements
Birth (term)	Fixation
	Poor following
	Intermittent strabismus frequently present
	Visual acuity 20/400 to 20/600
One month	Horizontal following to midline
	Normal alignment
	Visual acuity 20/300
Two months	Vertical following begins
	Normal alignment
	Visual acuity 20/200
Three months	Good horizontal and vertical following
	Normal alignment
	Visual acuity 20/100
	Accommodation begins
	Binocularity detectable
Six months	Visual acuity 20/20 to 20/30
	Binocularity well developed
Eight to 10 years	End of sensitive period for amblyopia