Download presentation
Presentation is loading. Please wait.
Published bySamantha Gleghorn Modified over 9 years ago
1
Neuroophthalmology from the Perspective of an Anterior Segment Surgeon Gerhard K. Lang Department of Ophthalmology University of Ulm
2
Neuroophthalmology from the Perspective of an Anterior Segment Surgeon Gerhard K. Lang Department of Ophthalmology University of Ulm
3
Eye - and Brain - Entertainment „Do not trust your eyes!“ REM
4
Optical Illusions and visual Phenomena: Illusion and Reality Salvadore Dali 1904-89 Gala looking into the Mediterranean Sea Effect:“Lincoln Illusion“ („block masking“) Harmon LD & Julesz B (1973). Masking in visual recognition: Effects of two-dimensional filtered noise. Science 180:1194–1197
5
Ambiguous pictures Reversible goblet – Edgar J. Rubin
6
Ambiguous pictures Effect: rival-schemata ambiguity
7
Rabbit and Duck Ambiguous pictures Effect: rival-schemata ambiguity
10
Sigmund Freud, Neurologist, 1856-1939
11
Kanisza figure (Gaetano Kanisza) Effect: subjective or illusory contours Congnitive- / Gestalt Field
12
Effect: subjective or illusory contours
14
Size Illusions Original: Müller-Lyer Illusion
15
St Michael's Hill, Bristol, England Effect: „Bristol Café wall Illusion“ This illusion demonstrates the effect of some simple image processing occurring at the retina combined with some complex processing in the cortical cells of the striate cortex.
16
Geometric- & Angle Illusion Gregory RL & Heard P (1979) Border locking and the Café Wall illusion. Perception 8:365–380 The apparent tilt of the mortar lines is caused by orientation-sensitive simple cells in the striate cortex.
17
The cushion Illusion This drawing consists solely of rectangles and squares, set straight and true; the curvature is all in your mind. Akiyoshi Kitaoka 1998
20
Petersdom, Fassade von C. Maderno 1607-1612
21
Fraser`s Spiral („Twisted Cord Illusion“) Fraser J (1908) A New Visual Illusion of Direction. Brit J Psych 2:307-320
22
Drawing hands, Tekenen – M.C. Escher Maurits Cornelius Escher, Niederlande 1898-1972 The magic mirror of M.C. Escher Effect: Impossible objects
23
Belvédère M.C. Escher 1958
25
The Pool David MacDonald
26
The Terrace David MacDonald
27
Pergola, Istvan Orosz, Hungary 1951 www.utiz.net
29
Hidden Images Worth1000.com
30
„The Face in the Beans“ Furitsu (2002) photoshop contest Worth1000.com Effect: „one shot learning“
31
Dallenbach`s figure
34
Adelson`s „Checker-shadow illusion“ Adelson EH (1993) Perceptual organization and the judgment of brightness.Science 262:2042-2044 Luminance & Contrast
37
Hermann Grid Illusion Luminance & Contrast Hermann L (1870) Eine Erscheinung simultanen Contrastes. Pflügers Archiv für die gesamte Physiologie 3:13–15
38
Scintillating Grid Schrauf M, Lingelbach B, Wist E.(1997) The scintillating grid illusion. Vision Res 37:1033-1038 Luminance & Contrast
39
Rotating Snake Illusion Kitaoka A, Ashida H (2003) Phenomenal characteristics of the peripheral drift illusion. VISION 15:261-262 Effect: Illusory motion
40
Enigma This image „The Enigma“ is by Isia Leviant (1984) Effect: Illusory visual motion
42
final test 10 seconds concentration Where is the giraffe ?
44
Department of Ophthalmology Thank you for your attention ! City Center of Ulm
45
World Ophthalmology Congress 6 –10 June 2010 Berlin Germany www.woc2010.de
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.