A slightly different case history question - How long do you read before the words start to move, lose your place, or blur?” Also colours are solutions for various conditions including visual stress. Developmental Optometrist
Good morning and thank you for your question and comment. Regarding the length of time before distortions become present, it really depends on the severity of the sensitivity. For some with more severe visual stress and light/pattern sensitivity, as found in many with head injury or concussions, the perceptual distortions are immediate, for others, with less severe sensitivity sometimes more common with migraine or learning disability, it can take a few minutes. Sometimes, it takes time for the client to realize what is actually happening to make it so hard for them to read. Once you ask the question "Why is it hard to look at the text?" and investigate further than just looking away or stopping reading, they begin to realize that there is movement or flashing or fading or blurring, whatever they see is what is overwhelming them and causing visual discomfort. This is understood even further when they see the text behind a coloured filter. At this point, they often comment further on the distortions because now they can see the text NOT moving and then realize in more detail what is happening. It is really quite amazing to see the realization come over them. Sorry, long answer, but while there are some consistencies, it is different for each person. Regarding your comment that colours help various conditions, sort of yes. What I mean is, there are a lot of neurological and neurodevelopmental conditions that have the tendency towards hyperactivation in the visual cortex, that is, visual stress. So you might find that colours help people with autism, chronic fatigue, Lyme disease, cluster headaches (and others noted at www.opticalm.ca/related-conditions ) but it is the hyperactivation that the colours are helping to calm and normalize, making it easier for the individual to manage the other symptoms of the neuro condition they have. Please reach out to me if you would like more information - info@opticalm.ca Karen
@@karenmonet An example of colour being used for ocular issues are as simple as SAD. A little more complex is compensating for chromatic aberration of the eyes. Eg blue has a plus lens effect. An accommodative dysfunction would benefit from plus or blue tint. Also for a low myope red lens tints act like a minus lens improving distance vision. Finally I often find that the best colour at near is different from the distance colour. The colorimeter is an excellent instrument for measuring near colours. However for distance I find that trial tinted lenses are best.
A slightly different case history question - How long do you read before the words start to move, lose your place, or blur?”
Also colours are solutions for various conditions including visual stress.
Developmental Optometrist
Good morning and thank you for your question and comment.
Regarding the length of time before distortions become present, it really depends on the severity of the sensitivity. For some with more severe visual stress and light/pattern sensitivity, as found in many with head injury or concussions, the perceptual distortions are immediate, for others, with less severe sensitivity sometimes more common with migraine or learning disability, it can take a few minutes. Sometimes, it takes time for the client to realize what is actually happening to make it so hard for them to read. Once you ask the question "Why is it hard to look at the text?" and investigate further than just looking away or stopping reading, they begin to realize that there is movement or flashing or fading or blurring, whatever they see is what is overwhelming them and causing visual discomfort. This is understood even further when they see the text behind a coloured filter. At this point, they often comment further on the distortions because now they can see the text NOT moving and then realize in more detail what is happening. It is really quite amazing to see the realization come over them. Sorry, long answer, but while there are some consistencies, it is different for each person.
Regarding your comment that colours help various conditions, sort of yes. What I mean is, there are a lot of neurological and neurodevelopmental conditions that have the tendency towards hyperactivation in the visual cortex, that is, visual stress. So you might find that colours help people with autism, chronic fatigue, Lyme disease, cluster headaches (and others noted at www.opticalm.ca/related-conditions ) but it is the hyperactivation that the colours are helping to calm and normalize, making it easier for the individual to manage the other symptoms of the neuro condition they have.
Please reach out to me if you would like more information - info@opticalm.ca
Karen
@@karenmonet An example of colour being used for ocular issues are as simple as SAD.
A little more complex is compensating for chromatic aberration of the eyes. Eg blue has a plus lens effect. An accommodative dysfunction would benefit from plus or blue tint. Also for a low myope red lens tints act like a minus lens improving distance vision.
Finally I often find that the best colour at near is different from the distance colour.
The colorimeter is an excellent instrument for measuring near colours. However for distance I find that trial tinted lenses are best.