Experience in Clinical Examination of Corneal Sensitivity: Corneal Sensitivity and the Naso-Lacrimal Reflex after Retrobulbar Anaesthesia

Experience in clinical examination of corneal sensitivity; corneal sensitivity and the naso-lacrimal reflex after retrobulbar anaesthesia.

AN evaluation of the corneal sensitivity is an important part of many general clinical examinations and of all ophthalmological, neurological, and otological examinations. Interest in corneal sensitivity was already alive at the beginning of the 19th century, but an exact method for measuring it was not known until von Frey (1894) introduced a method, using different calibres and lengths of hai...

Assessment of Corneal Sensitivity.

ACCURATE measurement of corneal sensitivity was first attempted by von Frey (1894), using as a criterion the length and bend of a horse hair through which pressure was applied and increased until the threshold of sensation was reached. The basic principle laid down by von Frey was generally accepted. Modifications were made by using different materials and adjustable plastic thread, which permi...

Corneal Sensitivity and Contact Lenses.

IT is a matter of experience that certain persons adjust well to contact lenses while others do not, despite perfect fitting. This adjustment is greatly facilitated if the sensitivity of the cornea is decreased, as it is after cataract extraction. One is therefore tempted to consider corneal sensitivity as a determining factor for the success of a fitting. Previous investigation of the subject ...

Corneal sensitivity in myasthenia gravis.

Corneal touch thresholds were measured in 11 people suffering from myasthenia gravis (MG) and in a control group of 20 subjects. The mean threshold in MG was 75.6 mg (SD 52) and in the control group 18.9 mg (SD 7.3); thresholds were thus significantly (p less than 0.01) raised in MG. Although it is not possible to say whether the sensory deficit is due to MG or to the treatment, the results imp...

Diurnal variation of corneal sensitivity.