Wat hebben de ogen van hond/kat, dat een mensen en primaten niet hebben?
Tapetum lucidum = reflector
Beter zicht, zeker ‘s nachts
Zien honden en katten beter in het donker dan mensen?
Ja Tapetum lucidum + meer staafjes
Honden 5 x beter / Katten 6-8 x beter
, Wat kan je terugvinden in het netvlies en voor wat dienen ze?
Staafjes: detecteren kleurintensiteit (’s nachts)
Kegeltjes: kleur zien
Zijn honden en katten bijziend?
Ja, dicht = scherp, ver = wazig
Mens
Hond / kat
Waarom kunnen honden dan vb. een tennisbal vlak voor hun neus zo moeilijk zien?
Limiet aan bol worden vd lens
Hond: dichter dan 33-50 cm = niet meer scherp zien
Mens: dichter dan 7-10 cm = niet meer scherp zien
Wanneer gaan de oogjes van pups en kittens open?
Na 10 – 14 dagen
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