In one such case study of the treatment of amblyopia in an adult, Anita Simmers and Lyle Gray (both based in Glasgow Caledonian University) reported the case of a 30-year-old strabismic amblyope
. (11) This individual had received orthoptic therapy including patching in early childhood.
Figure 7 The proportion of practitioners willing to fit a young amblyope
with contact lenses (Question 11) Be happy to fit her for full time 58% wear providing her mum is aware of the risk involved Agree to fit her but only for 34% occasional wear providing her mum is aware of the risk involved Refuse to fit her due to her age 8% and/or amblyopia and advise thinner spec lenses Note: Table made from pie chart.
(25) However, a randomised controlled trial found that amblyopes
who were trained by viewing sinusoidal gratings at the limit of their high spatial frequency cut-off, showed improvements in that task but also concurrently in visual acuity.
This helps discovering undiagnosed amblyopes
who have been missed in earlier screening programs or those living in countries with poor medical services and no screening programs [7, 8].
Although amblyopia is usually diagnosed as a decrease in vision in a single eye, amblyopes
also suffer widespread deficits in spatial function.
Bobier, "Transient improvements in fixational stability in strabismic amblyopes
following bifoveal fixation and reduced interocular suppression," Ophthalmic and Physiological Optics, vol.
Table 3: Status after 3 Months Post-occlusion Therapy in Different Degree of Amblyopes
Post-Occlusion Therapy--Third Month Degree of Amblyopia Improved Not Improved Total Moderate Amblyopia 30 6 36 Row% 83.33% 16.67% 100.00% Col% 85.71% 40.00% 72.00% Severe Amblyopia 5 9 14 Row% 35.71% 64.29% 100.00% Col% 14.29% 60.00% 28.00% Total 35 15 50 Row% 70.00% 30.00% 100.00% Col% 100.00% 100.00% 100.00%
Characteristics of glucose metabolism in the visual cortex of amblyopes
using positron-emission tomography and statistical parametric mapping.
Cobb CJ, Russell K, Cox A, MacEwen CJ, 2002, Factors influencing visual outcome in anisometropic amblyopes
, Br J Ophthalmol;
Mean RNFLT has been shown to be lower in amblyopes
compared to normal individuals by Duranoglu.14 However, a definitive cause-and-effect relationship between amblyopia and the findings of his study could not be assigned.
[2.] Ciuffreda KJ, Kenyon RV Accommodative vergence and accommodation in normals, amblyopes
, and strabismics.
The other one assessed the sensory eye dominance in treated anisometropic amblyopes