title: Measurement of a photoreceptor's characteristic waveguide parameter.
mesh_terms: D000818:Animals; D001718:Birefringence; D004175:Diptera / Q000502:physiology*; D005260:Female; D066298:In Vitro Techniques; D008027:Light; D010786:Photoreceptor Cells / Q000033:anatomy & histology / Q000502:physiology*