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ordinary frame, which has to be placed upon the face. With this frame the patient sits down to a table, or stands in front of the frame, and presses his temples against the rests provided for the purpose ; the trial frame can then be adjusted for height and pupillary width, and locked in position. There is no obstruction in the way of placing the test lenses in the cells, and owing to the frame being locked there is no chance of the frame moving whilst inserting or taking out lenses.

Electrical Berger Loup and Head Bands.

Punctometers.

Optometer, nickel plated, with stand.

Illuminating Brackets.

This illuminating bracket is strongly made in brass, nickel-plated, fitted with double ball and socket joint, enabling the lamp and reflector to be placed in any position without clamping. It has a Universal wall joint, which allows the bracket to be raised, lowered, or swung back to the wall.

The reflector is fitted with a cover on which is fixed an iris diaphragm, graduated from 5 to 25 mm. The above bracket is fitted complete with an electric lamp.

Dr. Bishop-Harman s new Diaphragm Test.

New Colour Perception Lamp.

Electric Colour Perception Lamp.

This lamp is the improvement of the lantern described on p. 263 of “ Colour Blindness and Colour Perception ” (Kegan Paul & Co.) and enables the operator to make the test very quickly, while placing at his disposal a great many combinations of colours.

There are four wheels, three of which each contain yellow, pure green, standard green, blue, purple, red 1 and red 2, and the fourth ground glass, ribbed glass, neutral 1, neutral 2, neutral 3, neutral 4. In addition provision is made for extra modifying glasses to be put in front of the lamp if required.

Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 99,71 %.

La langue de reconnaissance de l'OCR est l'Anglais.