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Difference between revisions of Frequently Asked Questions/Myopia
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20/20 is a barn door. It’ll do, as far as determining a ballpark for your eyesight, and a means to figure out how much lens correction will give you the clearest possible vision. Consider this, the tool used by optometry, and it’s vaguest accuracy, before ‘blindly’ trusting the mainstream lens sales with your eyesight.}} | 20/20 is a barn door. It’ll do, as far as determining a ballpark for your eyesight, and a means to figure out how much lens correction will give you the clearest possible vision. Consider this, the tool used by optometry, and it’s vaguest accuracy, before ‘blindly’ trusting the mainstream lens sales with your eyesight.}} | ||
==What is axial elongation?== | ==What is axial elongation?== | ||
{{also|Frequently Asked Questions/Myopia/Quotes#Axial elongation}} | |||
[[Axial elongation]] is the increase in length of the eyeball. It happens when you wear glasses and look at screens for extended periods of time. Specifically, it happens due to [[hyperopic defocus]] as a result of [[close work]] combined with [[glasses]] that are [[overprescribed]] for the [[focal distance]] in question. | [[Axial elongation]] is the increase in length of the eyeball. It happens when you wear glasses and look at screens for extended periods of time. Specifically, it happens due to [[hyperopic defocus]] as a result of [[close work]] combined with [[glasses]] that are [[overprescribed]] for the [[focal distance]] in question. | ||
{{jake says|Axial elongation is the elongating of the eyeball. Speculation abounds as to the causes, though the most accepted is that axial elongation is just part of the whole story. Axial change, rather than axial elongation alone should be considered as a mechanism by which the eye compensates for focal plane error.}} | {{jake says|Axial elongation is the elongating of the eyeball. Speculation abounds as to the causes, though the most accepted is that axial elongation is just part of the whole story. Axial change, rather than axial elongation alone should be considered as a mechanism by which the eye compensates for focal plane error.}} | ||
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{{clear}} | {{clear}} | ||
===Is infant myopia normal?=== | ===Is infant myopia normal?=== | ||
{{also|Frequently Asked Questions/Myopia/Quotes#Infant myopia}} | |||
Most children are born [[hyperopic]] or [[myopic]]. Over the first few years, their eyes grow to be approximately [[emmetropic]], with least variability at about 6 years of age. | Most children are born [[hyperopic]] or [[myopic]]. Over the first few years, their eyes grow to be approximately [[emmetropic]], with least variability at about 6 years of age. | ||
===Do glasses make my eyes worse?=== | ===Do glasses make my eyes worse?=== | ||
{{also|Frequently Asked Questions/Myopia/Quotes#Glasses progressing myopia via hyperopic_defocus | |||
'''Yes''', when the glasses are for distance and you perform excessive periods of [[close-up activity]]. | '''Yes''', when the glasses are for distance and you perform excessive periods of [[close-up activity]]. | ||
===What is form deprivation myopia?=== | ===What is form deprivation myopia?=== | ||
{{also|Frequently Asked Questions/Myopia/Quotes#Form deprivation}} | |||
Search for 'form deprivation' in this study: https://www.sciencedirect.com/science/article/pii/S0896627304004933 | Search for 'form deprivation' in this study: https://www.sciencedirect.com/science/article/pii/S0896627304004933 | ||