• Meridional aniseikonia occurs when these refractive differences only occur in one meridian (see astigmatism). (wikipedia.org)
  • citation needed] For reducing aniseikonia, similar to contact lens correction, optical image size difference will be reduced in refractive surgeries also. (wikipedia.org)
  • Aniseikonia due to uniocular aphakia is best corrected surgically by intraocular lens implantation. (wikipedia.org)
  • Rarely, fusion cannot occur because of dissimilar image size, which can occur after changes in the optical function of the eye following refractive surgery (eg, LASIK) or after a cataract is replaced by an intraocular lens or because of aniseikonia, which represents a discrepancy in image size perceived by the two eyes. (medscape.com)
  • When the disparity appears to vary across the visual field (field-dependent aniseikonia), as may be the case with an epiretinal membrane or retinal detachment, the aniseikonia cannot fully be corrected with traditional optical techniques like standard corrective lenses. (wikipedia.org)
  • The broader activation of spatial contrast sensitivity, with a significant improvement in lower spatial frequencies, contributed to improving visual acuity. (bvsalud.org)
  • The person should notice that the target appears larger to the eye that it is directly in front of. (wikipedia.org)
  • The principles behind this demonstration are relative distance magnification (closer objects appear larger) and asymmetrical convergence (the target is not an equal distance from each eye). (wikipedia.org)