Refraction of the harp seal, Pagophilus groenlandicus (Erxleben 1777).
D000065:Accommodation, Ocular; D000818:Animals; D001251:Astigmatism; D010872:Caniformia / Q000502:physiology*; D007908:Lens, Crystalline / Q000502:physiology; D008386:Marine Biology; D011680:Pupil / Q000502:physiology; D012029:Refraction, Ocular; D014792:Visual Acuity