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THE surface temperature of the cornea is determined by adjacent ocular and extra-ocular tissues-an internal environment-and by conditions prevailing external to the body-an external environment. Any investigation of their effects is rendered more complex than would otherwise be the case in that the external environment is intermittently excluded during blinking so that, when the lids are closed, the thermal environment of the cornea is exclusively internal. The effect on corneal and pericorneal temperature of lid closure and opening These authors measured temperature by contact; Zeiss (1930) also investigated the effects on corneal temperature of ocular inflammation but here a radiometric method was used. The purpose of this paper is to examine the various factors that determine corneal tem- perature and inter alia those that cause a difference in temperature between the right and left cornea of an individual.
R Mapstone (Tue,) studied this question.