Age-related changes in the central visual field for short-wavelength-sensitive pathways

1988 ◽  
Vol 5 (12) ◽  
pp. 2131 ◽  
Author(s):  
Chris A. Johnson ◽  
Anthony J. Adams ◽  
J. Daniel Twelker ◽  
Jacqueline M. Quigg
Keyword(s):  
Visual Field ◽  
Short Wavelength ◽  
Central Visual Field ◽  
Age Related ◽  
Age Related Changes

scholarly journals Age-Related Changes in the Functional Visual Field: Further Evidence for an Inverse Age x Eccentricity Effect

2004 ◽  
Vol 59 (1) ◽  
pp. P11-P18 ◽  
Author(s):  
T. R. M. Coeckelbergh ◽  
F. W. Cornelissen ◽  
W. H. Brouwer ◽  
A. C. Kooijman
Keyword(s):  
Visual Field ◽  
Eccentricity Effect ◽  
Age Related ◽  
Age Related Changes

Comparison of Age-Related Changes in Short- Wavelength-Sensitive Cone Thresholds between Normals and Patients with Primary Open-Angle Glaucoma

1995 ◽  
Vol 72 (3) ◽  
pp. 205-209 ◽  
Author(s):  
LYLE S. GRAY ◽  
GORDON HERON ◽  
DAVID CASSIDY ◽  
GRAEME M. CLARK ◽  
GERALD R. COWLEY ◽  
...  
Keyword(s):  
Short Wavelength ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Open Angle ◽  
Age Related ◽  
Age Related Changes

Implantation of the First IMT Macular Lens in Age-Related Macular Degeneration (Literature Review)

2019 ◽  
Vol 4 (4) ◽  
pp. 56-60
Author(s):  
M. M. Bikbov ◽  
O. I. Orenburkina ◽  
A. E. Babushkin
Keyword(s):  
Visual Field ◽  
Macular Degeneration ◽  
Peripheral Vision ◽  
Age Related Macular Degeneration ◽  
Central Vision ◽  
Central Visual Field ◽  
Visual Rehabilitation ◽  
Age Related ◽  
Terminal Form ◽  
Special Programs

This review presents the characteristics and results of clinical studies of patients with age-related macular degeneration implanted with the developed for this purpose first macular IOL – intraocular macular telescope (IMT). This lens was designed specifically for patients with the most severe or terminal form of age-related macular degeneration and is designed for monocular implantation to provide central vision while maintaining peripheral vision of the paired eye, which is important for maintaining the balance and orientation of patients. This device allows patients to see both in dynamic and static situations in the near, intermediate and far ranges. The disadvantages of this lens are a decrease in the visual field and depth of focus (which excludes its bilateral implantation), the need for a large (10–12 mm) incision for implantation, which can cause an increase in corneal astigmatism and the risk of complications, in particular, the pupillary block with an increase in intraocular pressure. There are also difficulties in the study of the fundus after its implantation to assess the small changes in the macula or to identify possible postoperative complications after cataract surgery (macular oedema, etc.). Also after the implantation of this lens, there is need for special programs of visual rehabilitation. The patient’s commitment to the rehabilitation measures for the adaptation of the central visual field of the operated eye with the peripheral vision of the second eye is crucial for success of the IMT macular telescope implantation procedure.

Circular vection in patients with age-related macular degeneration

1999 ◽  
Vol 9 (4) ◽  
pp. 287-291
Author(s):  
Hiroaki Fushiki ◽  
Satoru Takata ◽  
Yasunori Nagaki ◽  
Yukio Watanabe
Keyword(s):  
Visual Field ◽  
Macular Degeneration ◽  
Matched Control ◽  
Age Related Macular Degeneration ◽  
Control Group ◽  
Central Visual Field ◽  
Matched Control Group ◽  
Circular Vection ◽  
Age Related ◽  
Significant Difference

We have used optokinetic stimulation in patients with unilateral age-related macular degeneration (AMD) and central scotoma to investigate the possible contribution of the central visual field to circular vection (CV). Six patients aged 42–73 years with unilateral AMD and an aged-matched control group of nine elderly adults aged 47–75 years were examined. Monocular visual field defects were verified with the Goldmann perimeter by kinetic perimetry. The device used to induce CV was a random dot pattern projected onto a hemispherical dome with a radius of 75 cm. The pattern was rotated horizontally at a constant acceleration of 1 deg/s 2 . Monocular stimuli were randomly repeated two to three times in both temporal-nasal (T-N) and nasal-temporal (N-T) directions. The latency of onset of CV was measured for each stimulus presentation. In the age-matched control group the CV latencies varied from 4.2 to 72.0 s. In each case, however, the CV latencies were stable. No significant differences in CV latencies were found between right and left eyes in both stimulus directions ( p > 0.05). In patients with AMD, no statistically significant difference in CV latency was found between the affected and unaffected eyes ( p > 0.05). Marked central visual field loss in AMD does not significantly impair peripherally induced CV. Our results are compatible with the hypothesis that the peripheral retina dominates CV.

scholarly journals Differential age-related changes in localizing a target among distractors across an extended visual field

2016 ◽  
Vol 14 (2) ◽  
pp. 167-177 ◽  
Author(s):  
Jing Feng ◽  
Fergus I. M. Craik ◽  
Brian Levine ◽  
Sylvain Moreno ◽  
Gary Naglie ◽  
...  
Keyword(s):  
Visual Field ◽  
Age Related ◽  
Age Related Changes

Age-Related Changes of the Normal Visual Field

1986 ◽  
Vol 104 (7) ◽  
pp. 1021-1025 ◽  
Author(s):  
G. J. Jaffe ◽  
J. A. Alvarado ◽  
R. P. Juster
Keyword(s):  
Visual Field ◽  
Age Related ◽  
Normal Visual Field ◽  
Age Related Changes

scholarly journals Usage of Digital D Chart Test as a Modification of Amsler Grid in Ophthalmology and Optometry

2020 ◽  
Vol 76 (4) ◽  
pp. 160-164
Author(s):  
Magdaléna Bočková ◽  
Petr Veselý ◽  
Pavel Beneš
Keyword(s):  
Visual Field ◽  
Quantitative Evaluation ◽  
Central Visual Field ◽  
Grid Deformation ◽  
Age Related ◽  
Significant Difference ◽  
Simple Detection ◽  
Important Symptom ◽  
Amsler Grid

Aims: Metamorphopsia is important symptom of macular disease. The most common simple detection method of metamorphopsia is Amsler grid. Usually it is used monocularly with best correction for near. Patient should evaluate grid deformation and describe position of the deformity. This method is based on qualitative principle. For quantitative evaluation we can use Software D Chart (Thomson Software Solution). This instrument enables evaluate degree and position of the metamorphopsia in central visual field. Our goal was to establish M-score values in group of young healthy subjects without correction (M-score natural), with cylindrical spectacle lens (M-score SL) and in group of patients with age related degeneration (M-score ARMD). Objects and Methods: We had 33 probands divided into 2 samples. The first sample contains 15 young probands with average age 23 years without any eye pathology. The second sample contains 18 patients with ARMD (7 with dry form and 11 with wet form). In our study we used software D Chart (Thomson Software Solution). This software was use in Acer PC with touchable screen. We note total M-score in right eye of all probands. Level for statistic evaluation was set on p = 0.05. Results: Natural M-score values for young probands was: median 0, minimum 0, maximum 2.3. With cylindrical lens we got these values: median 25.2, minimum 3.6, maximum 41.6. In second sample with probands suffer from ARMD we got these values: median 0.8, minimum 0, maximum 29.4. Wilcoxon non-parametric test was used for statistical evaluation. We proved statistically significant difference between all variables. M-score natural vs. M-score SL showed p < 0.001, M-score natural vs. M-score ARMD showed p = 0.04 and M-score SL vs. M-score ARMD showed p < 0.001. Conclusion: Our study showed statistically significant differences between variable M-score natural, M-score SL and M-score ARMD. We found that printed Amsler grid as well as its digital modification D Chart are suitable for determining metamorphopsia in central visual field. The main advantage of D Chart is quantitative evaluation of the test with M-score and digital registration of retinal changes during patient´s follow up.

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