seizures triggered by flickering or flashing
lights. It also may be called photic epilepsy or
photogenic epilepsy. Photosensitive epilepsy is
a fairly rare form of epilepsy that can trigger
a seizure on exposure to certain types of
flashing or flickering lights or patterns. Only
a small percent of epilepsy sufferers are
photosensitive, although the condition may also
manifest itself in people with no previous
history of epilepsy. It is more common in
Suppressive efficacy by a commercially
available blue lens on PPR in 610
photosensitive epilepsy patients.
hundred ten epilepsy patients were
tested. Four hundred (66%) were female
patients; 396 (65%) were younger than 14
years. Three hundred eighty-one (62%)
subjects were pharmacologically treated
at the time of investigation. Z1 lenses
made PPR disappear in 463 (75.9%)
patients, and PPR was considerably
reduced in an additional 109 (17.9%) of
them. photoparoxysmal response remained
unchanged only in the remaining 38
(6.2%) patients. The response of PPR to
Z1 lenses was not significantly
influenced by the patients' age, sex, or
type of epilepsy. No difference was
found between pharmacologically treated
and untreated patients.
Treatment of photosensitivity.|
from individual preventive measures (use
of specific television or video screens,
colored glasses, etc.), prevention and
warning on a larger scale are helpful.
nonpharmacologic treatment for
photosensitive epilepsy: a report of
three patients tested with blue
preliminary data suggest that blue
cross-polarized lenses may be useful in
the treatment of photosensitive
epilepsies and that their efficacy can
be predicted in the EEG laboratory.
Treatment of photosensitive epilepsy
using coloured glasses.
a modest reduction in EEG
photosensitivity with the coloured
lenses but also to an equivalent or
lesser extent with grey in all of the
eight patients examined in this way.
Effectiveness of a particular blue lens
on photoparoxysmal response in
photosensitive epileptic patients.
that the experimental lens type was very
effective for photosensitivity
inhibition in epileptic subjects.
Indeed, photoparoxysmal response (PPR)
disappeared in 64 of 83 patients (77%)
and diminished in 16 (19%).
Usefulness of blue sunglasses in
results suggest that the suppressive
effect of the three sunglasses on FDP
stimulation is mainly due to a luminance
diminution, whereas that of blue
sunglasses on RF stimulation is produced
by an inhibitory effect of short
wavelengths and possibly by a luminance
diminution. Thus, blue sunglasses are
thought to be useful in the treatment of
patients with photosensitive epilepsy.
Colour and photosensitive epilepsy.|
suggest that the blue filter allows a
small percentage of light transmission
and under these conditions the
electrical events that follow light
stimulation do not occur.