Visual Perception Assessment Overview or testing your brains software
Visual perception is our ability to perceive visual information, understand what we are seeing and memorised it for the long time.
There are different components to visual perception. In the visual perception assessment we will cover all aspects of visual perception. All the component are tested by the TVPS- Test Visual Perception Skills.
Visual discrimination is the ability to find small differences between multiple images, Such as the ability to notice the difference between +/-, red/read and more without confusion – TVPS.
Visual memory is the ability to understand information and memorise it or remember a picture/image for a long time. Children with low visual memory ability will find it difficult to repeat a read paragraph. Low visual memory will affect the comprehension and understanding of reading material – TVPS.
Visual Spatial Relations is the ability to recognize a different pattern or shape from a sequence of other shapes. Low visual spatial relations can affect geometry, science learning and is also evidences in the reversal of letters and numbers – TVPS.
Visual Form Constancy is the ability to recognize an image in different sizes, orientations and positions. Children with low Form Constancy would confuse between the letter ‘b’ and ‘d’ or ‘6’ and ‘9’. This reverse letters and numbers can decelerate learning - TVPS.
Visual Sequential Memory is the ability to memorize a sequence of different shapes in a specific order. Children with low visual sequential memory would find it difficult to follow and remember things such as process steps, storylines or explanations – TVPS.
Visual Figure Ground is the ability to recognize and locate an image in a busy background with a high value of visual information (The Crowding Effect). Children with low visual figure ground would find it very difficult to concentrate and comprehend reading or mathematical tasks on a full page with small gaps – TVPS.
Visual closure is the ability to visualise an image with missing or incomplete visual information. Children with low visual closure will find it difficult to visualise instructions or explanations - TVPS.
Children with ocular movement and fixation dysfunction will find it difficult to maintain fixation at one point at space for efficient time in order to perceive the visual information. Therefore, the ability to fixate and ocular movement should be trained. Once the fixation is achieved the next step in the process can be trained which is the ability to understand and memorised the visual information for long time – Ocular Movement Test include saccades and purest movement Groffman Visual Tracing test, NSUCO, Fixation test.
Visual perception includes a variety of visual functioning. It is the ability to perceive a three dimensional image. This can demonstrate an equal visual acuity and strong binocular system that stimulate the binocular cells and forward the visual information into deeper layers of the visual cortex – test with cover test, motor fusion and sensory fusion tests.
Reversal letters is a common issue with children at early stages of learning. While some children can overcome this by the age of six to eight years old some kids are still found it difficult to right without reversing some of the letters. The most common letters are P, Q, and D but can be other letters as well. Orthoptic eye therapy can improve recognition, right and left gaze and reversal letters. The test used for that is Jordan Left Right Reversal Test.