Final answer:
An 'against movement' in retinoscopy means the light reflected from the retina moves opposite to the retinoscope's light, indicating myopia. It is not related to eye or muscle movements such as straining, relaxing, looking straight ahead, or closing the eyes.
Step-by-step explanation:
When using a retinoscope, an 'against movement' indicates that the light reflected from the patient's retina is moving in the opposite direction to the movement of the retinoscope's light source. This typically signifies that the patient's eye refractive power is greater than the power of the retinoscope's light at the plane of the retina, suggesting that the patient may be myopic (nearsighted). This observation is not directly related to the patient's muscle or eye movement activities such as straining, relaxing, looking straight ahead, or closing their eyes, but rather it is a diagnostic sign used to understand the optical focusing properties of the eye. The question does not reflect any of these bodily actions, therefore, options 1 to 4 are all incorrect in the context of retinoscopy findings.