240
M. I. Baritz and A. M.Lazar
286
287
287
288
288
1
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
284
286
288
1
13
25
37
49
61
73
85
97
109
121
133
145
157
169
181
193
205
217
229
241
Fig. 5 Displacements [µm] on X-direction without nystagmus (left) and with nystagmus movements (right) (in abscise are no. of samples)
132
133
133
1
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
154
155
155
156
156
1
10
19
28
37
46
55
64
73
82
91
100
109
118
127
136
145
154
163
172
181
190
199
208
217
Fig. 6 Displacements [µm] on Y-direction without nystagmus (left) and with nystagmus oscillations (right) (in abscise are no. of samples)
-4.5
0.5
5.5
10.5
15.5
20.5
1
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
Total velocity [µm/s]
0
5
10
15
20
1
10
19
28
37
46
55
64
73
82
91
100
109
118
127
136
145
154
163
172
181
190
199
208
217
Total velocity [mm/s]
Fig. 7 Total velocity [µm/s] measured for eye without nystagmus (left) and with nystagmus
oscillations (right) (in abscise are no. of samples)
the nystagmus eye movements exceed with 26% the variation limits in the case of
a physiological (functional) nystagmus, values were determined in the same conditions for subjects with and without the emphasis of the saccade movements. These
variations may indicate a form of visual stress and may be monitored over longer
periods to identify the cause of the oscillations changes in the eyeball and the possibilities to rehabilitation if the saccade movements are only physiological. Immediate
applications of this recording system can be developed by taking into account several
parameters of the state and functioning of the visual system to track the evolution of
nystagmus over time (Fig. 7).
Acknowledgements In these experiments, we have developed the investigations with equipment
from Advanced Mechatronic Systems Research Center—C04 and Applied optometry Laboratory at
University Transylvania of Brasov, in Ph.D. school Program.
M. I. Baritz and A. M.Lazar
286
287
287
288
288
1
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
284
286
288
1
13
25
37
49
61
73
85
97
109
121
133
145
157
169
181
193
205
217
229
241
Fig. 5 Displacements [µm] on X-direction without nystagmus (left) and with nystagmus movements (right) (in abscise are no. of samples)
132
133
133
1
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
154
155
155
156
156
1
10
19
28
37
46
55
64
73
82
91
100
109
118
127
136
145
154
163
172
181
190
199
208
217
Fig. 6 Displacements [µm] on Y-direction without nystagmus (left) and with nystagmus oscillations (right) (in abscise are no. of samples)
-4.5
0.5
5.5
10.5
15.5
20.5
1
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
Total velocity [µm/s]
0
5
10
15
20
1
10
19
28
37
46
55
64
73
82
91
100
109
118
127
136
145
154
163
172
181
190
199
208
217
Total velocity [mm/s]
Fig. 7 Total velocity [µm/s] measured for eye without nystagmus (left) and with nystagmus
oscillations (right) (in abscise are no. of samples)
the nystagmus eye movements exceed with 26% the variation limits in the case of
a physiological (functional) nystagmus, values were determined in the same conditions for subjects with and without the emphasis of the saccade movements. These
variations may indicate a form of visual stress and may be monitored over longer
periods to identify the cause of the oscillations changes in the eyeball and the possibilities to rehabilitation if the saccade movements are only physiological. Immediate
applications of this recording system can be developed by taking into account several
parameters of the state and functioning of the visual system to track the evolution of
nystagmus over time (Fig. 7).
Acknowledgements In these experiments, we have developed the investigations with equipment
from Advanced Mechatronic Systems Research Center—C04 and Applied optometry Laboratory at
University Transylvania of Brasov, in Ph.D. school Program.