Anisometropia and Aniseikonia Flashcards
Aniseikonia is a greek word which means what?
Unequal images
Commented upon the probability of unequal
image sizes.
Donders
Designed iseikonic lenses for aniseikonia.
Von Rohr
Discussed the possibility
C. Hess
Condition in which the size and shape of the
ocular images are equal
Iseikonia
Condition in which ocular images are unequal in size and shape
Aniseikonia
Lenses which correct aniseikonia and include also the correction of refractive error.
Iseikonic lenses
What are the two types of aniseikonia.
Static and Dynamic
What are the classifications of aniseikonia.
Symmetrical and Asymmetrical
The size of one ocular image is symmetrically larger that the other
Overall
The size of one ocular image is symmetrically larger that the other in one meridian only
Meridional
combination of overall and meridional is manifested.
Compound
image distortion increases progressively in both directions
Pincushion
image size remains the same but there occurs an oblique distortion of shape.
Oblique
image difference increases progressively in one direction
Prismatic
image distortion decreases progressively in both directions
Barrel
What are the utilized classification of Davis?
Normal and abnormal
It is based on a modification of stereopsis.
Space eikonometer
Based on binocular space perception
Space eikonometric method
Based on directly comparing perceived image sizes between the two eyes
Direct comparison method
What does “opia” means?
Vision
What does “iso” means?
Equal
What does “metr” means?
Measure
What does “an” means?
Not
is defined as a condition in which the refractive status of one eye differs from that the other.
Anisometropia
