What is the role of retinal pigment epithelium cells?

They restore visual proteins and clear waste from photoreceptor cells.

What happens if photoreceptor or pigment epithelial cells are damaged?

It hinders physiological circulation and affects visual function.

What are the two types of light damage to tissues?

1. Thermal damage 2. Photochemical damage.

What causes acute burns in retinal tissue?

High light energy that raises the temperature of retinal tissue significantly.

What is photochemical damage?

Damage caused by chemical changes from light exposure over time.

What did Dr. Noell discover in 1965?

Chronic exposure to fluorescent light can cause irreversible retinal damage.

What is associated with age-related macular degeneration?

Long-term damage from light, especially short-wavelength blue light.

Does using a phone in the dark cause blindness?

It may cause eye strain due to strong light energy and chronic damage.

Why do we perceive phone light as strong in the dark?

Because the surrounding light is low, making the phone's brightness seem intense.

Does using a mobile phone in the dark cause blindness?

No, the absolute brightness of mobile phone light is lower than other light sources.

What is the effect of mobile phone light compared to other light sources?

Mobile phone light has less absolute energy and is not more harmful than other light sources.

Is mobile phone blue light more harmful than sunlight?

No, sunlight contains more short-wavelength light and UV rays than mobile phone light.

What happens to the pupil in the dark?

The pupil dilates from about 3mm to 6-7mm, allowing more light in.

What is the wavelength of blue light from mobile phones?

The blue light from mobile phones is around 460 nanometers.

What should we be more concerned about regarding blue light exposure?

People working outdoors are exposed to more short-wavelength light than from mobile phones.

What type of signal does the eye convert light signals into before transmitting to the brain?

A. Chemical signal B. Electrophysiological signal C. Visual signal D. Biological signal

Which type of cell is responsible for converting light signals into electrophysiological signals?

A. Cone cells B. Rod cells C. Photoreceptor cells D. Sensory cells

How many types of cone cells do humans have?

A. One type B. Two types C. Three types

What type of signal does the eye convert light signals into before transmitting to the brain?

A. Chemical signal B. Electrophysiological signal C. Visual signal D. Biological signal

Which type of cell is responsible for converting light signals into electrophysiological signals?

A. Cone cells B. Rod cells C. Photopigment cells D. Photoreceptor cells

What type of light is the S-type cone cell most sensitive to?

A. Red light B. Green light C. Blue light D. Yellow light

What is one of the main functions of the pigment epithelium cell according to the article?

A. Produce photopigments B. Restore photopigments to their original state C. Absorb light signals D. Fix the retina

What conditions are necessary for 'photothermal damage' to occur?

A. Extremely high light energy B. Extremely short light wavelength C. High concentration of photopigments D. Increased number of cone cells

What phenomenon causes the photochemical damage mentioned in the article?

A. Electromagnetic waves in light B. Chemical changes caused by light C. Cone cell mutations D. Lens deformation

What is the reason mentioned in the article for why using a phone in the dark can cause eye strain?

A. Phone brightness is too high B. Phone emits too much red light C. Darkness creates a strong contrast in brightness D. Phone light source is mainly ultraviolet light

Which statement about blue light is correct?

A. Blue light only exists in phones B. The blue light wavelength from phones is shorter than that in natural light C. Sunlight contains more blue light and short wavelength light D. Blue light has no effect on the eyes

What should be noted when using a phone in the dark according to the article?

A. Phone brightness is insufficient B. Poor posture and eye fatigue C. More light is needed for illumination D. Use more red light to protect vision

Which options describe the potential damage to the eyes mentioned in the article?

A. Photothermal damage B. Photochemical damage C. Photon radiation damage D. Infrared damage

Which methods may help protect eye health according to the article?

A. Avoid looking directly at the sun B. Control phone brightness C. Use a phone for long periods in a dark room D. Maintain good eye posture and take breaks

What are the possible harms of light to the eyes mentioned in the article?

A. Thermal damage B. Photochemical damage C. Photon radiation damage D. Infrared damage

What methods may help protect eye health according to the article?

A. Avoid direct sunlight B. Control phone brightness C. Use phone in dark for long periods D. Maintain good posture and take breaks

What factors may cause chronic damage to the eyes?

A. Prolonged exposure to high-intensity light sources B. Long-term use of blue light LEDs C. Cumulative damage from short-wavelength light in daily life D. Properly controlling phone brightness and having enough rest

What are the potential hazards of using a phone in the dark?

A. Eye fatigue and dryness B. Neck problems due to poor posture C. Affecting sleep quality D. Temporary blindness

Why is it important for visual health?

It is important for visual health because exposure to certain types of light, such as blue light, can cause potential harm to the eyes.

Why does using a phone in the dark cause discomfort?

Using a phone in the dark can cause discomfort due to the contrast between the bright screen and the dark environment, leading to eye strain.

What are the potential harms of short-wavelength light (like blue light) to the eyes?

Short-wavelength light can cause damage to the eyes, including photochemical damage and increased risk of eye fatigue.

Why is smartphone blue light unlikely to cause acute vision damage in daily use?

Smartphone blue light is unlikely to cause acute vision damage because the exposure is typically not intense enough to cause immediate harm.

Impact of Mobile Use on Eye Health Flashcards

Student preview

58 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What happens to the eyes when using a phone in the dark?

Back

Using a phone in the dark can potentially harm your eyesight.

2.

FLASHCARD QUESTION

Front

What are the two types of photoreceptor cells in the human eye?

Back

The two types of photoreceptor cells are cone cells and rod cells.

3.

FLASHCARD QUESTION

Front

What are the three types of cone cells and their sensitivity?

Back

S-type is sensitive to blue light, M-type to green light, and L-type to red light.

4.

FLASHCARD QUESTION

Front

How do photoreceptor cells convert light into electrical signals?

Back

Photoreceptor cells change the structure of photopigments when stimulated by light, generating bioelectric signals.

5.

FLASHCARD QUESTION

Front

What role do retinal pigment epithelial cells play?

Back

They restore photopigments and clear waste produced by photoreceptor cells.

6.

FLASHCARD QUESTION

Front

Why do photoreceptor cells need a good blood supply?

Back

They require a high blood supply and oxygen to maintain their metabolic activities.

7.

FLASHCARD QUESTION

Front

What can happen if photoreceptor cells are damaged?

Back

Damage to these cells can disrupt physiological processes and affect vision.

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