Table 3.

Summary of the recommendations for the selection of visual tasks and the initial parameters of the stimulus that should be used in vision training for amblyopia according to the scientific evidence revised.

Stimulus	Initial Parameters	Visual Tasks
Letter optotypes	1. Low spatial frequency and prolonged exposure 2. Maximum contrast 3. First order achromatic and steady stimulus without noise or masking	Letter recognition with and without crowding Orientation discrimination
Gabor’s patch	1. Low spatial frequency and prolonged exposure 2. Maximum contrast 3. Achromatic and steady stimulus without noise nor masking	Orientation discrimination
Vernier’s stimulus	1. Prolonged exposure 2. Maximum contrast 3. Achromatic and steady stimulus without noise nor masking	Continuity discrimination
RDS	1. Decreased luminance in fellow eye for allowing binocular vision 2. First order achromatic and steady stimulus 3. Neither masking nor noise	Objects recognition in stereoscopic conditions

RDS: random-dot stereogram.