Arnold J. Wilkins
- Published in print:
- 1995
- Published Online:
- January 2008
- ISBN:
- 9780198521747
- eISBN:
- 9780191706691
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780198521747.003.0009
- Subject:
- Psychology, Cognitive Neuroscience
A new system for precision ophthalmic tinting is described, together with some preliminary findings. A colorimeter is described that illuminates text with coloured light in such a way that the hue, ...
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A new system for precision ophthalmic tinting is described, together with some preliminary findings. A colorimeter is described that illuminates text with coloured light in such a way that the hue, saturation, and brightness can be varied separately. The colorimeter is used to guide the precise dyeing of coloured ophthalmic lenses.Less
A new system for precision ophthalmic tinting is described, together with some preliminary findings. A colorimeter is described that illuminates text with coloured light in such a way that the hue, saturation, and brightness can be varied separately. The colorimeter is used to guide the precise dyeing of coloured ophthalmic lenses.
Arnold J. Wilkins
- Published in print:
- 1995
- Published Online:
- January 2008
- ISBN:
- 9780198521747
- eISBN:
- 9780191706691
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780198521747.003.0006
- Subject:
- Psychology, Cognitive Neuroscience
Most electric lighting pulsates in brightness twice with each cycle of the alternating electricity supply. Fluorescent lighting fluctuates to such an extent as to affect the firing of visual neurons. ...
More
Most electric lighting pulsates in brightness twice with each cycle of the alternating electricity supply. Fluorescent lighting fluctuates to such an extent as to affect the firing of visual neurons. The fluctuation is responsible for more than half the headaches and eye-strain suffered by office workers. Glasses that absorb light at the short wavelength end of the visible spectrum, where the fluctuations are maximal, may reduce headaches in children with migraine.Less
Most electric lighting pulsates in brightness twice with each cycle of the alternating electricity supply. Fluorescent lighting fluctuates to such an extent as to affect the firing of visual neurons. The fluctuation is responsible for more than half the headaches and eye-strain suffered by office workers. Glasses that absorb light at the short wavelength end of the visible spectrum, where the fluctuations are maximal, may reduce headaches in children with migraine.
Mark Selikowitz
- Published in print:
- 1993
- Published Online:
- November 2020
- ISBN:
- 9780192622990
- eISBN:
- 9780191918391
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780192622990.003.0020
- Subject:
- Education, Teaching of Specific Groups and Special Educational Needs
There are no quick and easy ways of overcoming a specific learning difficulty, but conventional management, as outlined in this book, will always bring results eventually. When there is no ...
More
There are no quick and easy ways of overcoming a specific learning difficulty, but conventional management, as outlined in this book, will always bring results eventually. When there is no effective cure for a condition, numerous dubious ‘cures’ arise. The existence of a number of so-called cures is usually a sign that no single one is effective. An effective treatment quickly displaces all others. Some of these treatments are a waste of time and money that could be spent more profitably in other ways to benefit the child. Some may be harmful to the physical and psychological well-being of the child. Some may have detrimental effects on the family as a whole. It is important, therefore, that you obtain reliable information from your doctor or psychologist before becoming involved in any treatment. Do not rely on stories of miraculous cures from those who promote these treatments. Evaluations should be by controlled trials published in reputable journals. Such trials should be carried out ‘blind’ whenever possible, meaning that the person who assessed the performance of children both on and off the treatment did not know which had received treatment and which had not until after the assessments were completed. If the treatment consists of a medicine, the untreated group should have received a dummy medicine (placebo) to make the comparison valid. In addition, the person who carried out the trial should not have had any vested interest in the treatment. An increasing number of independent trials of controversial treatments are now reported in scientific journals. In addition, professional and government bodies often make policy statements about certain treatments based on reviews of scientific data. If you plan to start a treatment, first be certain that you understand the risks involved. Decide upon what objective improvement you wish to see, and how long it should take before this occurs. If the objective improvement is not achieved, treatment should cease. Do not allow yourself to accept some vague qualitative improvements decided upon at a later date. Children with specific learning difficulties always develop new skills, and usually do so in sudden spurts followed by periods of consolidation.
Less
There are no quick and easy ways of overcoming a specific learning difficulty, but conventional management, as outlined in this book, will always bring results eventually. When there is no effective cure for a condition, numerous dubious ‘cures’ arise. The existence of a number of so-called cures is usually a sign that no single one is effective. An effective treatment quickly displaces all others. Some of these treatments are a waste of time and money that could be spent more profitably in other ways to benefit the child. Some may be harmful to the physical and psychological well-being of the child. Some may have detrimental effects on the family as a whole. It is important, therefore, that you obtain reliable information from your doctor or psychologist before becoming involved in any treatment. Do not rely on stories of miraculous cures from those who promote these treatments. Evaluations should be by controlled trials published in reputable journals. Such trials should be carried out ‘blind’ whenever possible, meaning that the person who assessed the performance of children both on and off the treatment did not know which had received treatment and which had not until after the assessments were completed. If the treatment consists of a medicine, the untreated group should have received a dummy medicine (placebo) to make the comparison valid. In addition, the person who carried out the trial should not have had any vested interest in the treatment. An increasing number of independent trials of controversial treatments are now reported in scientific journals. In addition, professional and government bodies often make policy statements about certain treatments based on reviews of scientific data. If you plan to start a treatment, first be certain that you understand the risks involved. Decide upon what objective improvement you wish to see, and how long it should take before this occurs. If the objective improvement is not achieved, treatment should cease. Do not allow yourself to accept some vague qualitative improvements decided upon at a later date. Children with specific learning difficulties always develop new skills, and usually do so in sudden spurts followed by periods of consolidation.
