The Eye-VapoMeter is, according to Delfin Technologies, the first and only portable instrument to easily measure tear evaporation rate (TER for Tear Evaporation Rate). This evaporation rate may vary as a result of dry eye syndrome, or if the subject wears contact lenses.
"With the Eye-VapoMeter, the effectiveness of a treatment is easy to determine by measuring the TER".says Delfin Technologies.
Thus, for example, in preclinical studies evaluating the effect of semifluorated alkanes on the ocular surface and the dynamics of tear fluids (studies conducted, among others, by the University of Auckland's Department of Ophthalmology, the German company Novaliq), the rate of tear evaporation was measured by evaporimetry using a Delfin Eye-VapoMeter SWL5 modified by Delfin Technologies for testing on the relatively small rabbit eye by attaching a child-sized swim goggle to the instrument. TER measurements were recorded in duplicate for each eye and averaged (mean of four measurements in total). Diurnal variation and repeatability of TER measurements were checked by taking ten consecutive TER readings in each eye (20 per rabbit) at two different times on the same day without prior instillation of a test eye drop.
The advantages of the Eye-VapoMeter are :
- a rotating adapter adapted to the eye
- wide measuring field, up to 300 g/m2h, without saturation
- rapid measurement (15 to 20 seconds)
- a closed, draught-proof room
- a portable instrument that runs on batteries, without cables
- wireless measurement transfer
- an instrument also available with adapters for animals
