This is a sample of the BUST playing cards. BUST has been designed and developed to suit the specific needs of the groups of children mentioned above. It can also be used with older children and with adults.

The validity of the test results depends on the skill of the examiner and the child's co-operation. Young children find BUST easy and attractive. The tester can use BUST to allow children to practise vision tasks, to carry out initial assessments and to prepare children for other more exact visual acuity tests.

The pictures can easily translate into sign language. Visual Acuity is normally assessed by using letter charts at a distance of 6M, "distance vision", measured in standard 6/6-6/60 ("Snellen acuity") or by graded reading for "near vision".

Research and clinical experience have shown that these tests are not always successful with young children because of the character of the test symbols and the distance used during testing. The young child is used to looking at close objects . The assessment with the BUST playing cards allows the child to choose the preferred visual distance. The pictures are printed in black on a white background.

The pictures show authentic objects which are interesting to the child and simple and easy to understand.

The pictures are available in different sizes some of which are bigger than those commonly found in near vision tests. The BUST test is base don pedagogical and psychological principles, it may also be used as training material. Fot this purpose some of the BUST pictures are also available as stickers. Within each pair ability to distinguish between the pictures will depend on visual acuity. When the child can no longer see the details of the picture, they merge and the child mixes up scissors with glasses and forks with spoons. This is not observed by the child and so avoids the negative effect of a sense of failure. If the child can visually identify the objects at a very close proximity( up to about 1.5 metres ) but is not able to transfer this skill to the pictures we can assume that approximate va is about 0.01-0.05. The child may not be able to maintain a steady focus and may also have a visual field loss. We are not able to tell this without a detailed eye examination. The cards have a symbol in the middle. The circle in the middle indicates the three largest 1-3. The square in the middle indicates the sizes 4-6, the triangle indicates the three smallest 7-9.

In addition the tester can mark the cards 1-9.