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Welcome to the Pubget Medical Subject Headings (MESH) browser. Click on a topic or subtopic below to explore related papers. In the gold box is the most recent paper about the current MESH term, and below are 20 related papers.
Aniseikonia (0):
Recent article
Aniseikonia
Abstract
We demonstrate how a predefined lateral magnification (e. g., from the contralateral eye) can be realised during cataract surgery by calculating an appropriate combination of an IOL and a spectacle correction. WORKING EXAMPLES: In example 1 the lateral magnification of the reference eye following ca...
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PMID: 18759207
PDF is available here.
PDF is available here.
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Abstract
Anisometropia is not a rare condition and should be assessed before cataract surgery. A comprehensive method to calculate the objective aniseikonia and to measure the subjective aniseikonia in anisometropia was proposed. If cataract surgery is considered in anisometropic patients, a postoperative an...
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PMID: 18655987
PDF is available here.
PDF is available here.
Abstract
In general direct-comparison aniseikonia tests have a repeated measurement accuracy of approximately 0.5% standard deviation (this also includes actual aniseikonia fluctuations). A direct-comparison aniseikonia test with free eye rotation seems to underestimate the amount of aniseikonia. However, co...
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PMID: 19132952
PDF is available here.
PDF is available here.
Abstract
When considering the clinical relevance of the findings in the article, it becomes clear that the Aniseikonia Inspector is a useful (and only) tool for complete aniseikonia management....
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PMID: 18702609
PDF is available here.
PDF is available here.
Optometry and Vision Science (84)12 2007
Abstract
On average, the most accurate and repeatable measurement of aniseikonia was found with Version 1 in the vertical meridian in the dark. Measurement of aniseikonia in the horizontal meridian appears to be less reliable. Version 2 overestimates size lens-induced aniseikonia under all testing conditions...
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PMID: 18091308
PDF is available here.
PDF is available here.
Abstract
Abstract
Of the 358 patients studied, 22.7% were men and 67.3% women. The average age was 38.3 (SD 17.3) years. 40.2% of the patients were emmetropic and 59.8% had some type of ametropia. When analyzing the refractive defect measured as the spherical equivalent we found a higher prevalence of myopia than hyp...
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PMID: 17323247
PDF is available here.
PDF is available here.
Abstract
Abstract
The reliability of the AI is only moderate, and professionals are therefore warned to use the results of this test with caution....
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PMID: 17197516
PDF is available here.
PDF is available here.
Abstract
When reporting the aniseikonia of patients with retinal conditions, one cannot speak of 'the' aniseikonia(i.e., a single value or a single value for each direction), because it is most likely field-dependent. It is also important to use a test that only measures static aniseikonia (direct comparison...
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PMID: 17688418
PDF is available here.
PDF is available here.
Optometry and Vision Science (83)12 2006
Abstract
We conclude that the repeatability of the NAT is not very high and recommend that clinicians be cautious when interpreting the results of this test....
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PMID: 17164683
PDF is available here.
PDF is available here.
Optometry and Vision Science (83)11 2006
Abstract
For the Space Eikonometer, the slopes of the lines for the relationship between the measured aniseikonia and the induced magnification differences in the vertical and horizontal meridians are not significantly different from 1.0. For the Aniseikonia Inspector, the slopes of the lines in the vertical...
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PMID: 17106411
PDF is available here.
PDF is available here.
Abstract
Orthoptic anomalies are prevalent: they are encountered in at least 5% of patients seen in a typical primary eyecare practice. Several cases are reviewed that highlight the role of contact lenses in treating orthoptic anomalies. In particular, contact lenses are the preferred optical approach to the...
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PMID: 16713327
PDF is available here.
PDF is available here.
Ophthalmology (113)1 2006
Abstract
Aniseikonia may vary with VFA due to a retinal cause such as an epiretinal membrane. The problem with field-dependent aniseikonia is that it cannot be corrected fully with conventional optics, which exhibit an approximately constant magnification as a function of VFA. Nevertheless, by correcting 5%...
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PMID: 16343626
PDF is available here.
PDF is available here.
Abstract
The aniseikonia test used in this study can be considered a simple, fast, valid and reliable method to measure the difference in image size perceived by each eye. Aniseikonia does occur in symptomatic patients with ERM. The effect of ERM on image size is heterogeneous across the retinal area affecte...
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PMID: 16299133
PDF is available here.
PDF is available here.
Abstract
The formula is applicable to both stigmatic and astigmatic systems without restriction. A detailed numerical example for an unusual eye is provided. CONCLUSION: A formula for the determination of the intra-ocular lens required to produce any given transverse image size at the retina is derived. This...
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PMID: 16343133
PDF is available here.
PDF is available here.
Abstract
The capabilities of this computing scheme are demonstrated with two examples. In example 1 we calculate a toric lens and a spherocylindrical spectacle correction for compensation of a corneal astigmatism to realize a predefined iso-meridional magnification. In example 2 we first determine the meridi...
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PMID: 15649181
PDF is available here.
PDF is available here.
Aniseikonia testing in an adult population using a new computerized test, the Aniseikonia Inspector.
Abstract
The means and standard deviations of the measured aniseikonia in the vertical, horizontal, and oblique meridians were -0.5% (2.5%), -0.1% (3.3%) and 0.3% (2.8%) respectively. The means in the vertical and oblique meridians were significantly different from 0.0 (p=0.0001, p=0.0314) while that in the...
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PMID: 16384529
PDF is available here.
PDF is available here.
Abstract
These results, together with others on different binocular functions, show the importance of aniseikonia in binocular vision. On this basis, we recommend that aniseikonia be considered in surgical processes such as cataract and refractive surgery, whereby aniseikonia could be induced and binocular p...
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PMID: 15252357
PDF is available here.
PDF is available here.
Abstract
In normals, measurement of the 20% artificial aniseikonia ranged from 10% to 21% (mean 15%) using the NAT, and from 16% to 39% (mean 27.1% vertically and 24.6% horizontally) using the Hess Chart. In the 21 patients with pathologic aniseikonia, the NAT measurements ranged from 0% to 24% (upper limit...
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PMID: 15530140
PDF is available here.
PDF is available here.
[Clinical analysis of binocular anisei konia after laser in situ keratomileusis on myopic patients].
Abstract
When the binocular diopter difference was < or = 2.5 D, there was no significant difference between the preoperative and postoperative BA. When the diopter difference was > 2.50 D, the incongruons images of simultaneous perception and stereoscopic vision after operation had significant divergence co...
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PMID: 12870347
PDF is available here.
PDF is available here.
Aniseikonia tests: valid = true but true is not equal to p or =.05 or p anything. The NAT is useful.
Abstract
Abstract
Abstract
The average ratio between the measured aniseikonia and the induced aniseikonia was 0.98, 0.89 and 0.93 respectively for the vertical, horizontal and diagonal directions. For two consecutive measurements of the same aniseikonic state, the difference in measurement value was 97%, 75% and 94% of the ti...
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PMID: 12765541
PDF is available here.
PDF is available here.
Abstract
Abstract
We evaluate the impact of induced aniseikonia on stereopsis. For this, we determined the disparity range (maximum disparity), a parameter related to the size of the physical region that can be perceived stereoscopically. A significant decline in the disparity range was detected with aniseikonia indu...
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PMID: 11871399
PDF is available here.
PDF is available here.
Abstract
Vision Research (41)5 2001
Abstract
We conclude that even a 2% image size inequality stimulates oculomotor learning, leading to persistent disconjugacy of saccades. The small disparity created by the image-size inequality is thus compensated by the oculomotor system rather than tolerated by the sensory system (e.g. by enlarging the Pa...
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PMID: 11226507
PDF is available here.
PDF is available here.
Abstract
Anisometropia may affect and disturb the stereopsis. The degree of disturbance is related to the degree of anisometropia. The higher the degree of anisometropia, the lower the amplitude of the P(250) potential, and the main defect is at the part of fine disparity....
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PMID: 11853614
PDF is available here.
PDF is available here.
Abstract
Abstract
The findings confirm that ocular motility problems are not exclusive to scleral buckling, with the incidence being similar in both groups. Slinging of the extraocular muscles and the accompanying dissection, resulting in the 'fat adherence syndrome', must be considered as contributory factors. The v...
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PMID: 10654173
PDF is available here.
PDF is available here.
Optometry and Vision Science (76)11 1999
Abstract
For nearly 100 years, Prentice's rule has been used to determine the prismatic effect and prismatic differences at peripheral points in the binocular spectacle field. However, calculations show that the current application Prentice's rule is valid only for a single lens and only if that lens is cons...
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PMID: 10566863
PDF is available here.
PDF is available here.
Vision Research (39)18 1999
Abstract
We conclude that the monocular depth cues modulate the disconjugacy of saccades stimulated by the disparity of aniseikonic images....
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PMID: 10664808
PDF is available here.
PDF is available here.
Abstract
After unilateral implantation 87.1% of patients and after bilateral implantation 93.1% of patients correctly perceived the stereograms of the Lang random-dot test. The mean subjective height of the measured Titmus fly was 4.2 cm after unilateral and 4.3 cm after bilateral implantation. The stereoacu...
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PMID: 10445204
PDF is available here.
PDF is available here.
Archives of Ophthalmology (117)7 1999
Abstract
Aniseikonia caused by separation or compression of photoreceptors can be a contributing factor to the existence of diplopia and the inability to fuse in patients with macular disease. Concomitant small-angle strabismus and the inability to fuse with prisms may lead the clinician to the incorrect dia...
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PMID: 10408453
PDF is available here.
PDF is available here.
Survey of Ophthalmology (44)1 1999
Abstract
Abstract
Abstract
Abstract
Abstract
Abstract
Abstract
Thirty-five (40.2%) of all pseudophakes had ophthalmic complaints referable to aniseikonia. The mean aniseikonia in the unilateral pseudophakia group was 4.1%, SD=3.41, while the mean aniseikonia in the bilateral group was 3.2%, SD=2.6. CONCLUSION: Symptomatic aniseikonia is common in pseudophakia....
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PMID: 10553110
PDF is available here.
PDF is available here.
Abstract
Frequency of error: For Group 1 (24 cases): 5 ( or 21 %) were equal (i.e., 1% or less difference); 16 (or 67% ) were greater (more than 1% different); and 3 (13%) were less by Rule of Thumb calculation in comparison to aniseikonia determined on the Essilor eikonometer. For Group 2 (62 cases): 45 (or...
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PMID: 10553111
PDF is available here.
PDF is available here.
Abstract
Ten of the thirteen patients had their anisometropia due primarily to ocular axial length differences. Of these ten, seven (70%) had detectable levels of aniseikonia and 3 (30%) demonstrated no aniseikonia. The other three patients whose aniso-metropia was due to combined axial and refractive compon...
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PMID: 10553112
PDF is available here.
PDF is available here.
Abstract
Aniseikonia per se does not appear to have a major causal role in amblyopia or strabismus, but anisometropia does for amblyopia. This role is greatly augmented by aniseikonia and this combination may then produce strabismus....
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PMID: 10553113
PDF is available here.
PDF is available here.
Abstract
Knapp's Law may be optically right but clinically wrong. That is, its clinical application, which predicts the absence of aniseikonia in axial aniosometropias is not fulfilled. Retinal stretching due to myopia and resultant retinal micropsia is hypothesized to be the cause of this optically unexpect...
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PMID: 10553115
PDF is available here.
PDF is available here.
Abstract
Experimental Brain Research (122)4 1998
Abstract
We report here that memory-guided saccades to a disparate target flashed 1 s earlier become disconjugate following repeated trials. After 15 min of repetition, the disconjugacy persists even when the target to be remembered is no longer disparate. This suggests fast memory-based learning. Learning,...
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PMID: 9827860
PDF is available here.
PDF is available here.
Abstract
Our results confirm that modification of lens designs to equalize relative spectacle magnification reduces aniseikonia and improves subjective comfort and performance of anisometropic spectacles....
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PMID: 9785734
PDF is available here.
PDF is available here.
Abstract
Foveal translocation with intentional retinal detachment and scleral shortening was useful in improving visual acuity in two patients with myopic neovascular maculopathy. Diplopia and aniseikonia occurred but resolved over time as suppression developed. This technique is promising for patients with...
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PMID: 9625548
PDF is available here.
PDF is available here.
Nippon Ganka Gakkai zasshi (101)9 1997
Abstract
We performed the following experiments to evaluate the clinical usefulness of the New Aniseikonia Tests (NAT).
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PMID: 9311231
PDF is available here.
PDF is available here.
Survey of Ophthalmology (42)3 1997
Abstract
Survey of Ophthalmology (41)4 1997
Abstract
The diagnosis and management of aniseikonia has become a lost art. Refractive surgery and intraocular lens implantation has created a new patient population of anisometropia. Measurement of aniseikonia through instrumentation such as the space eikonometer is not readily available. Therefore, estimat...
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PMID: 9104769
PDF is available here.
PDF is available here.
Abstract
The techniques described are not costly, provide no risk, take little time, and resolve or meaningfully reduce aniseikonia in many patients having non-extreme errors of this type....
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PMID: 9049940
PDF is available here.
PDF is available here.
Abstract
Correction of the pseudophakic patient must consider the possibility of anisometropia with aniseikonia as a consequence. Particular attention has to be brought with young unilateral pseudophakic patient without presbyopia.
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PMID: 9490151
PDF is available here.
PDF is available here.
Abstract
Anisometropia may be responsible for aniseikonia. and anisophoria. In children, aniseikonia may create amblyopia. It is of utmost importance to distinguish axial from refractive anisometropia. When the anisometropia is axial in origin, spectacle lenses constitute the treatment of choice (Knapp's law...
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PMID: 9490157
PDF is available here.
PDF is available here.
Abstract
The corrected visual acuities were 0.6 or better. Visual acuities of 1.0 or better were achieved in 65% and 0.6-0.9 in 35% of the eyes. All patients obtained simultaneous perception and fusion function. The near stereoacuity of 50 cases showed foveal stereoacuity < or = 60 seconds in 23 cases (46%),...
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PMID: 9590847
PDF is available here.
PDF is available here.
Abstract
Abstract
Our results suggest that the closed-system approach using the spreader device allows safe implantation of the Worst iris-supported claw lens....
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PMID: 8705707
PDF is available here.
PDF is available here.
Vision Research (35)23-24 1995
Abstract
We identified three major components of the saccadic command (two phasic and one tonic) that contribute and in a specific way to the saccadic yoking and disconjugacy. The model analysis proposes that separate control mechanisms exist operating on these phasic and tonic signals. We show that the sacc...
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PMID: 8560813
PDF is available here.
PDF is available here.