Difference between revisions of Axial length
→Biology: Just some placeholder text so that I can include a reference to a paper that goes into all the gory details. |
No edit summary |
||
| Line 2: | Line 2: | ||
==Biology== | ==Biology== | ||
It would require precision engineering to be able to grow an eye that was perfectly [[emmetropic]] at birth. Instead, it is of approximate dimensions, and feedback during postnatal development tunes the axial length to match the focusing system. <ref>{{cite journal| author=Wallman J, Winawer J| title=Homeostasis of eye growth and the question of myopia. | journal=Neuron | year= 2004 | volume= 43 | issue= 4 | pages= 447-68 | pmid=15312645 | doi=10.1016/j.neuron.2004.08.008 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=15312645}}</ref> | It would require precision engineering to be able to grow an eye that was perfectly [[emmetropic]] at birth. Instead, it is of approximate dimensions, and feedback during postnatal development tunes the axial length to match the focusing system. Two mechanisms are available: changing the thickness of the [[choroid]], and changing the length of the eyeball itself. <ref>{{cite journal| author=Wallman J, Winawer J| title=Homeostasis of eye growth and the question of myopia. | journal=Neuron | year= 2004 | volume= 43 | issue= 4 | pages= 447-68 | pmid=15312645 | doi=10.1016/j.neuron.2004.08.008 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=15312645}}</ref> | ||
==How it can be reduced== | ==How it can be reduced== | ||