{"id":18592,"date":"2026-02-24T22:14:25","date_gmt":"2026-02-24T22:14:25","guid":{"rendered":"https:\/\/ideainthebox.com\/index.php\/2026\/02\/24\/a-retinal-reboot-for-amblyopia\/"},"modified":"2026-02-24T22:14:25","modified_gmt":"2026-02-24T22:14:25","slug":"a-retinal-reboot-for-amblyopia","status":"publish","type":"post","link":"https:\/\/ideainthebox.com\/index.php\/2026\/02\/24\/a-retinal-reboot-for-amblyopia\/","title":{"rendered":"A retinal reboot for amblyopia"},"content":{"rendered":"
\n

In the vision disorder amblyopia (or \u201clazy eye\u201d), impaired vision in one eye early in life causes neural connections in the brain\u2019s visual system to shift toward supporting the other eye, leaving the amblyopic eye less capable even if the original impairment is corrected. Current interventions don\u2019t work after infancy and early childhood, when the brain connections are fully formed.\u00a0<\/p>\n

Now a study in mice by MIT neuroscientist Mark Bear and colleagues shows that if the retina of the amblyopic eye is anesthetized just for a couple of days, those crucial connections can be restored, even in adulthood.<\/p>\n

Bear\u2019s team, which has been studying amblyopia for decades, had previously shown that this effect could be achieved by anesthetizing both eyes or the non-\u00adamblyopic eye, analogous to having a child wear a patch over the healthy eye to strengthen the \u201clazy\u201d one.\u00a0<\/p>\n

The new study<\/a> delved into the mechanism behind this effect by pursuing an earlier observation: that blocking the retina from sending signals to neurons in the part of the brain that relays information from the eyes to the visual cortex caused those neurons to fire \u201cbursts\u201d of electrical pulses. Similar patterns of activity occur in the visual system before birth and guide early synaptic development.<\/p>\n

The experiments confirmed that the bursting is necessary for the treatment to work\u2014and, crucially, that it occurs when either retina is targeted. After some mice modeling amblyopia had the affected eye anesthetized for two days, the researchers measured activity in the visual cortex to calculate a ratio of inputs from the two eyes. This ratio was much more even in the treated mice, indicating that the amblyopic eye was communicating with the brain about as well as the other one.<\/p>\n

A key next step will be to show that this approach works in other animals and, ultimately, people.<\/p>\n

\u201cIf it does, it\u2019s a pretty substantial step forward, because it would be reassuring to know that vision in the good eye would not have to be interrupted by treatment,\u201d says Bear. \u201cThe amblyopic eye, which is not doing much, could be inactivated and \u2018brought back to life\u2019 instead.\u201d<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

In the vision disorder amblyopia (or \u201clazy eye\u201d), impaired vision […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[226],"tags":[],"class_list":["post-18592","post","type-post","status-publish","format-standard","hentry","category-technology"],"acf":[],"_links":{"self":[{"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/posts\/18592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/comments?post=18592"}],"version-history":[{"count":0,"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/posts\/18592\/revisions"}],"wp:attachment":[{"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/media?parent=18592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/categories?post=18592"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ideainthebox.com\/index.php\/wp-json\/wp\/v2\/tags?post=18592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}