Question

when the eyes are suddenly exposed to bright light, the pupils immediately constrict, this is the (1.) reflex. this protective reflex prevents excessively bright light from damaging the delicate photoreceptors. the pupils also constrict reflexively when we view close objects, this (2.) pupillary reflex provides more acute vision.
reading requires almost continuous work by both sets of muscles. the muscles of the ciliary body bring about the lens bulge, and the circular (or constrictor) muscles of the (3.) produce the accommodation pupillary reflex. in addition, the extrinsic muscles must converge the eyes as well as move them to follow the printed lines. this is why long periods of reading (4.) the eyes and often result in what is commonly called eyestrain. when you read for an extended time, look up from time to time and stare into the distance. this temporarily (5.) all the eye muscles.

1. accommodation 2. iris 3. tire 4. relaxes 5. photopupillary
2. relaxes 2. photopupillary 3. accommodation 4. iris 5 tire
3. photopupillary 2. accommodation 3 iris 4. tire 5 relaxes
4. iris 2. tire 3. relaxes 4. photopupillary 5. accommodation

1 tire 2 relaxes 3. photopupillary 4 accommodation 5. iris

Explanation:

• 1. Photopupillary reflex: When eyes are exposed to bright light, the pupillary constriction is the photopupillary reflex which protects photoreceptors.
• 2. Accommodation pupillary reflex: Pupillary constriction when viewing close objects is the accommodation pupillary reflex for acute vision.
• 3. Iris: The circular (constrictor) muscles of the iris are involved in the accommodation pupillary reflex.
• 4. Tire: Long - term reading tires the eyes.
• 5. Relaxes: Looking into the distance relaxes the eye muscles.

Answer:

1. photopupillary 2. accommodation 3 iris 4. tire 5 relaxes