Gangguan panjanak
[[Berkas:Long cane.jpg|jmpl|Sabuting [[tungkat putih]], simbul tunanetra antarabangsa]]
'''Gangguan panjanak''' atawa '''kahilangan panjanak''' adalah panurunan kakawaan gasan manjanak di hingkat nang maulah masalah mang mamarluakan sabuting alat, kaya [[kacamata]].<ref name=WHODef/><ref name=CDC2011/> Sapalih urang nang baisi jua kakurangan kakawaaan gasan manjanak marga kada baisi kacamata atawa [[linsa kuntak]].<ref name=WHODef>{{cite web|title=Change the Definition of Blindness|url=https://www.who.int/blindness/Change%20the%20Definition%20of%20Blindness.pdf?ua=1|website=World Health Organization|access-date=23 May 2015|url-status=live|archive-url=https://web.archive.org/web/20150714233938/http://www.who.int/blindness/Change%20the%20Definition%20of%20Blindness.pdf?ua=1|archive-date=14 July 2015}}</ref> Istilah '''[[picak]]''' dipakai gasan kahilangan panjanak sahibaknya atawa parak sahibaknya.<ref name=Mab2006>{{cite journal | vauthors = Maberley DA, Hollands H, Chuo J, Tam G, Konkal J, Roesch M, Veselinovic A, Witzigmann M, Bassett K | display-authors = 6 | title = The prevalence of low vision and blindness in Canada | journal = Eye | volume = 20 | issue = 3 | pages = 341–6 | date = March 2006 | pmid = 15905873 | doi = 10.1038/sj.eye.6701879 | doi-access = free }}</ref> Gangguan panjanak kawa maulah kangalihan  dalam gawian sahari-hari kaya mawaca wan bajalan kadada palatihan atawa alat.<ref name=CDC2011/>

== Jujuhutan ==
Gangguan panjanak atawa kahilangan panjanak adalah panurunan kakawaan gasan manjanak di hingkat nang maulah masalah mang mamarluakan sabuting alat, kaya kacamata. Sapalih urang nang baisi jua kakurangan kakawaaan gasan manjanak marga kada baisi kacamata atawa linsa kuntak. Istilah picak dipakai gasan kahilangan panjanak sahibaknya atawa parak sahibaknya. Gangguan panjanak kawa maulah kangalihan  dalam gawian sahari-hari kaya mawaca wan bajalan kadada palatihan atawa alat.

 Jujuhutan