Relative Accommodation

The relative importance of the parasympathetic and sympathetic nervous systems for accommodation in monkeys.

The refractive state of monkeys was followed during preganglionic oculomotor nerve stimulation and during preganglionic sympathetic nerve stimulation performed against a background of oculomotor stimulation. It was found that oculomotor stimulation rates of 2 to 5 per second gave accommodative responses of about 1 to 3 D, and 20 to 50 stimuli per second gave about 6 to 11 D of accommodation. Ac...

Determining the relative contribution of retinal disparity and blur cues to ocular accommodation in Down syndrome

Individuals with Down syndrome (DS) often exhibit hypoaccommodation alongside accurate vergence. This study investigates the sensitivity of the two systems to retinal disparity and blur cues, establishing the relationship between the two in terms of accommodative-convergence to accommodation (AC/A) and convergence-accommodation to convergence (CA/C) ratios. An objective photorefraction system m...

Study of measurement and calculation of the relative amplitude of accommodation

Status of binocular vision is evaluated using binoculars and accommodative tests. The results of these tests allow the optometrist to decide or the type of lenses has to be prescribed or whether a vision therapy is required. The aim of this work is to check the accuracy of the measurement of the relative amplitude of accommodation. Relative accommodation amplitude assesses the ability to increa...

Convergence accommodation.

Steady-state accommodation responses were measured in both eyes as a function of vergence angle and direction of lateral gaze. The measurements were made with a binocular laser optometer. Small speckle patterns were used as fusional stimuli in an otherwise dark field. These patterns have the advantage of providing no blur stimulus to accommodation. Convergence accommodation for vergence angles ...

Accommodation Mandates