This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Aniseikonia means: 
Select and explain. 
A. Difference in the axial length of the eyeballs, B. Difference in the size of corneas, C. Difference in the size of pupils, D. Difference in the size of images formed by the two eyes.
D: Difference in the size of images formed by the two eyes.
Answer: D: Difference in the size of images formed by the two eyes. 
Explanation: D i.e. Difference in the size of images formed by the two eyes Condition Defined as Aniseikonia (upto 5% is well tolerated) The images projected to the visual coex from the two retina are abnormally unequal in size or shape i.e. difference in the image size Q Anisometropia Difference in the refraction of two eyes 0 Anisocoria Difference in the pupil size in two eyes Q