10 Conducting the Examination with a Computer/Laptop
44 / 86 Instruction Manual Mesotest II (G/62800/0715/en)
Test mesopic vision with glare for the left eye
Select test step 16.
Tell the patient to focus between the red fixation marks. Explain to
the patient that he must keep looking in that direction and must not,
under any circumstances, look directly at the glare light during any
of the subsequent tests.
Conduct test steps 17 through 20 in the same way as described
above, sec. , page 41.
The visual requirement is deemed met when the patient has recognised at
least 3 of 5 positions of the Landolt ring (60% criterion).
10.4.3 Test for Night Myopia (optional)
If your Mesotest II is equipped with minus lenses (Mesotest II, konkav),
you can conduct these additional examinations. With the minus lenses,
you can determine whether the patient suffers from night myopia.
The myopia test must be activated, “Activate myopia test” auf Seite 33.
Swing in the minus lenses for the last test that the patient just
recognised.
Press the button for the desired lens power.
If the visual acuity of the patient improves, he may suffer from night
myopia.
You can determine the extent of the night myopia by swinging in lenses
of different powers (-0.5/-1.0/-1.5 D).
Fig. 10-19: The buttons for minus lenses are activated
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