Site display: Normal | Text Only

My Collection | About Us | Teachers

Find objects

Select from more than one or two options below:

Objects search

Can't find what you're looking for? Try the search below.

Optometer, Europe, 1801-1900

  • Thumbnail1
  • Thumbnail2
  • Click the thumbnails to enlarge

Optometrists are trained to examine eyes and prescribe visual aids such as spectacles. This optometer dates from the 1800s. The optometer was used with various lenses to determine the refraction of the eye. Refraction means the extent to which light is bent by an individual’s eye. The result can determine how short sighted or long sighted they are, and the strength of spectacles required. In the second half of the 1800s, ophthalmologists also devised instruments to measure the separate components of vision. Dr Jules Badal developed this instrument in 1876. It was based on an optometer invented by William Porterfield in 1759.

Object number:

A625218

Related Objects

There are 461 related objects. View all related objects

 

Glossary:

Glossary: ophthalmology

The branch of medicine dealing with the diseases and surgery of the visual pathways (usually the eyes or the brain).

Glossary: optometer

An instrument for measuring the refractive properties of the eye