Keeler Tonocare, Manual

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33
It is well established that exposure of the eye to intense light
sources for extended periods of time poses a risk of retinal
photic injury. Many ophthalmic instruments illuminate the
eye with intense light. The light levels on the TonoCare have
been set at the lowest level possible.
No visible retinal lesions have been identified as a result of
using Pulsair tonometers, however, young children and
persons with diseased eyes may be at a higher risk. The risk
may also be slightly increased if the person being examined
has had any exposure with the same instrument or another
ophthalmic instrument using an intense visible light source
during the previous 24 hours. This will apply particularly if
the eye has been subjected to retinal photography.
5.0 Specifications and electrical ratings
(continued)
Parameter
Wavelength
(nm)
Storage Transport
ES-CL 250-400 2.358 E-05 μW cm-2
EUV-CL 360-400 2.707 E-07 mW cm-2
EA-R 305-700 1.027 E-02 μW cm-2
EIR-CL 770-2500 2.73 mW cm-2
EVIR-R 380-1400 1.664 E-05 W cm-2
Figure 1: Spectral irradiance of instrument at patient plane
Table 2: Calculated photochemical source radiances