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The Initial Progression of Physical and Perceptual Symptoms Associated With Aniseikonia.
Transl Vis Sci Technol
November 2024
Herbert Wertheim School of Optometry and Vision Science, University of California Berkeley, Berkeley, CA, USA.
Purpose: We aimed to evaluate the initial progression of physical and perceptual symptoms associated with wearing spectacles that produce unequal retinal image sizes in the two eyes (aniseikonia).
Methods: A within-subjects experiment (n = 20) was conducted to assess how symptoms change over one hour. Participants wore spectacles that contained a minifying lens (4%) over one eye and a plano lens over the other.
Impact of retinal traction induced by epiretinal membrane on aniseikonia.
Sci Rep
October 2024
Japanese Red Cross Society Himeji Hospital, 1-12-1 Shimoteno, Himeji, Hyogo, Japan.
We investigated the effect of retinal traction caused by epiretinal membranes (ERMs) on aniseikonia and retinal microstructures in 81 unilateral ERMs. Retinal traction was quantified by measuring the maximum depth of the retinal fold (MDRF) using en face optical coherence tomography (OCT) images. Measurements included the mean inner nuclear layer (INL), outer plexiform layer (OPL), outer nuclear layer (ONL), central retinal thickness (CRT), and interocular ratios of the foveal avascular zone (FAZ) area (FAZ ratio).
View Article and Find Full Text PDFStereoacuity and Aniseikonia: Evaluation Before and After Bilateral Implantation of Three Types of Presbyopia-Correcting Intraocular Lenses in Uncomplicated Phacoemulsification with Due Consideration of Interocular Differences in Higher Order Aberrations, Axial Lengths, Refractive Errors, and Acuities.
Clin Ophthalmol
June 2024
Department of Cataract and Refractive Surgery, University Eye Clinic Svjetlost, Zagreb, 10000, Croatia.
Purpose: To determine if the changes in stereoacuity and aniseikonia, following bilateral implantation of presbyopia correcting intraocular lenses could be predicted from preoperative measurements of higher order aberrations (HOAs), axial lengths (AL), refractive errors (RE) and corrected visual acuities (CVAs).
Patients And Methods: Stereoacuity (Randot tests, @6m & 40cm, in steps of 20 arcsecs") vertical and horizontal aniseikonia (Awaya test @6m, in steps of 1%) with best correction and HOAs (Shack-Hartmann aberrometer) were measured before, 3 and 6 months after uncomplicated bilateral phacoemulsification. Twenty patients (I) underwent a mix-and-match procedure (Tecnis MF, ZKB00 in one eye and ZLB00 in the other), 17 (II) were implanted with a trifocal (AT LISA 839 triMP) and 18 (III) with a one-piece diffractive (Synergy OU) intraocular lens.
Orbicularis oculi muscle activity during computer reading under different degrees of artificially-induced aniseikonia.
PeerJ
May 2024
Optics, Universidad de Granada, Granada, Granada, Spain.
Background: Aniseikonia is a binocular vision disorder that has been associated with asthenopic symptoms. However, asthenopia has been evaluated with subjective tests that make difficult to determine the level of aniseikonia. This study aims to objectively evaluate the impact of induced aniseikonia at different levels on visual fatigue by measuring the orbicularis oculi muscle activity in the dominant and non-dominant eyes while performing a reading task.
View Article and Find Full Text PDFAniseikonia and retinal morphological changes in eyes undergoing macular hole surgery.
Sci Rep
January 2024
Department of Ophthalmology, Toho University Ohashi Medical Center, 2-22-36, Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
Even after idiopathic macular hole (MH) surgery and with successful closure of MH, aniseikonia is a common postoperative symptom. We investigated the correlation of MH diameter, retinal displacement and retinal layer thicknesses with aniseikonia in 41 eyes of 41 patients undergoing MH surgery with internal limiting membrane peeling. Aniseikonia was measured with the New Aniseikonia Test.
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