Models for Demonstrating Refraction by Crossed Cylinders

Eitemau Tebyg

• A Modification of the Refraction Ophthalmoscope, with an Attachment for using Cylinder Lenses
  gan: Burnett, Swan M.
  Cyhoeddwyd: (1887)
• The principles of the cross cylinder and its uses in refraction.
  gan: Puntenney, Irving
  Cyhoeddwyd: (1954)
• An Analysis of the Refraction of 576 Healthy Human Corneæ, examined with the ophthalmometer of Javal & Schiötz
  gan: Burnett, Swan M.
  Cyhoeddwyd: (1888)
• A DISK OF LENSES TO BE USED IN DETERMINING REFRACTION BY MEANS OF SKIASCOPY
  gan: Burnett, Swan W.
  Cyhoeddwyd: (1888)
• Report on the Designation of Prisms by Degree of Refractive Power
  gan: Jackson, Edward, et al.
  Cyhoeddwyd: (1888)