Function

Suggested tools

Awareness of light

Dark room with ultraviolet light, fluorescent cloth, white gloves. Then red torch and white torch. Flashing/still

Blinds, fences and trees in sunlight

Attention to light and pursuit

Dark room. Torches, fluorescent materials in UV light. Bells

Pupil dilation, nystagmus

Small torch with observation only.
OKN drum for optokinetic response

Squint

Prisms

Pursuit

Finger puppet, toy car, ball, bubbles, moving people

Sacchades

Finger puppet and small toys

Acuity: distance

Mask, tinsel wig, black/white checks. Kay Pictures. Precision Vision Symbols

Acuity: near

Lea Gratings, Cardiff Cards, 100s and 1000s, facial recognition/expression

Contrast

Precision Vision: Hiding Heidi or symbol contrast charts. Choc button on contrasting/non-contrasting cloths

Fields of vision: upper

Yellow and black spinning pom-pom

Fields: lower

Stycar ball on stick

Complexity

Choc button then 100s and 1000s on plain then patterned cloth

Crowding

Precision Vision Single symbols and crowded symbols

Movement

Observation, moving toys

Dark Adaptation

Precision Vision tiles

Colour Vision

Precision Vision Colour Test