Vision loss has a detrimental impact on those affected, however, it is preventable, but why are we losing our vision and how can we protect it?

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Cov kev tsis pom kev tau tsim teeb meem ntau yam rau tej neeg, tab sis txawm li cas los peb yej muaj peev xwm tiv thaiv thiab pov puag tau kom txhob muaj tej teeb meem no.