ENVIRONMENTAL AND OCCUPATIONAL VISION PPT.pptx

Research work

1. A S E M I N AR PRESENTATION O N E N V IRONMENTAL AND OCCUPATIONAL VISION E f f e c t of Light , E r g o n omics and S c r e e n Use on Visual context B Y Dr. O K O RO JACINTA. 2 6 T H J U L Y , 2 2 4 .

2. Environmental and occupational vision refers to the impact of environmental and workplace factors on vision and eye health. Environmental factors that can affect vision include: 1. Ultraviolet (UV) radiation from the sun 2. Blue light from digital devices and LED lighting 3. Air pollution and dust 4. Extreme temperatures 5. Humidity and dryness

3. Occupational factors that can affect vision include: 1. Prolonged computer use and digital device usage 2. Chemical exposure and hazardous materials 3. Radiation and X-rays 4. Poor lighting and glare 5. Physical strain and ergonomic factors These environmental and occupational factors can lead to various eye problems, such as: 1. Dry eye and irritation 2. Digital eye fatigue 3. Blue light exposure and potential long-term risks 4. Chemical eye burns and injuries 5. Radiation-induced cataracts and eye damage.

4. EFFECT OF LIGHT, ERGONOMICS AND SCREEN USE ON VISUAL CONTEXT Visual context refers to the surrounding visual information that influences how we perceive and interpret visual elements, such as images, objects, or scenes. It includes factors like: 1. Background : The environment or setting in which the visual element is placed. 2. Surrounding objects: Other objects or elements nearby that can affect how we see the main visual element. 3. Lighting : The type and intensity of lighting, which can dramatically change the appearance of a visual element.

5. 4. Color: The colors used in the visual element and the surrounding context, which can impact mood, contrast, and legibility. 5. Texture: The surface quality or "feel" of the visual element and its surroundings. 6. Scale: The size of the visual element relative to its surroundings. 7. Composition: The arrangement of visual elements within a scene or image. 8. Cultural references : Symbols, icons, or visual elements that carry meaning within a specific cultural context.

6. Visual context helps us understand and interpret visual information by: 1. Providing clues about the visual element's purpose or function. 2. Influencing our emotional response to the visual element. 3. Affecting how we focus attention on the visual element. 4. Creating connections between the visual element and other visual information. Visual context is crucial for effective communication and interpretation.

7. LIGHT Light or lighting refers to the natural or artificial source of illumination that makes it possible for us to see objects, surroundings, and environments. Light can come from various sources, including: 1. Natural light : Sunlight, moonlight, and starlight. 2. Artificial light : Electric lamps, LEDs, fluorescent lights, and candles.

8. I ighting can be classified into different types based on its characteristics, such as: 1. Brightness : The intensity of light, measured in lumens. 2 . Color : The visible spectrum of light, ranging from red to violet. 3 . Direction : The way light is directed, such as direct, indirect, or diffuse. Light can significantly impact on visual context influencing how we perceive and interpret visual information. Ensuring sufficient lighting around is the most important part of appreciating visual context. Inadequate lighting forces the eyes to work overt i m e

9. to make sense of the task creating eye strain and headaches. Sufficient lighting helps accomplish the task without straining the eyes, without glares especially on the computer screen and eliminating unwanted dark spots and shadows. Here are some factors that can affect visual context: 1. Mood and atmosphere : Lighting can create a specific mood or atmosphere, such as warmth, coziness, or brightness.

10. 2. Visibility : Light enables us to see objects, textures, and colors, making visual context possible. 3. Shading and shadowing : Light creates shading and shadows, adding depth and dimensionality to visual context. 4. Color temperature : Different light temperatures (warm/cool) can alter color appearance and visual context. 5. Contrast : Lighting can create contrast, making certain elements stand out or recede into the background.

11. 6. Texture and detail : Light can accentuate or obscure texture and detail, changing the visual context. 7. Focus and attention : Lighting can guide attention and focus, directing the viewer's gaze. 8. Contextual meaning : Lighting can convey meaning and symbolism, such as associating bright light with happiness or warmth. 9 . Adaptation : Our eyes adapt to changing light conditions, affecting visual context perception.

12. ERGONOMIC Ergonomic refers to the design and arrangement of objects, systems, and environments to minimize stress, discomfort, and injury, while maximizing efficiency, productivity, and comfort. Some ergonomic factors that affect visual context: 1. Viewing angle : Ergonomic design ensures optimal viewing angles, reducing strain and improving visual context. 2. Display placement : Proper placement of displays and monitors affects visual context, reducing glare and reflections.

13. 3. Lighting : Ergonomic lighting design minimizes glare, reflections, and shadows, enhancing visual context. 4. Posture: Good posture, supported by ergonomic design, reduces eye strain and improves visual context. 5. Display size and distance: Ergonomic design ensures optimal display size and distance for comfortable viewing. 6. Color and contrast: Ergonomic design considers color and contrast to enhance visual context and reduce eye strain.

14. 3. Lighting : Ergonomic lighting design minimizes glare, reflections, and shadows, enhancing visual context. 4. Posture : Good posture, supported by ergonomic design, reduces eye strain and improves visual context. 5. Display size and distance : Ergonomic design ensures optimal display size and distance for comfortable viewing. 6. Color and contrast : Ergonomic design considers color and contrast to enhance visual context and reduce eye strain.

15. 7. Typography and layout : Ergonomic design optimizes typography and layout for clear and comfortable reading. 8. Minimizing distractions : Ergonomic design minimizes visual distractions, helping focus attention on relevant visual context.

16. SCREEN A screen is a surface that displays images or videos produced by computer, phone, or other electronic device. Here are some ways screen use affect visual context: 1. Blue light emission : Screens emit blue light, which can cause eye strain and disrupt visual context. 2. Display quality : Screen resolution, brightness, and contrast affect visual context, with higher quality displays providing sharper and clearer images.

17. 3. Viewing angle : Screen design and positioning impact viewing angle, which can affect visual context and cause eye strain. 4. Size and distance : Screen size and distance from the viewer influence visual context, with larger screens and closer distances potentially causing eye strain. 5. Color and contrast : Screen calibration and color accuracy impact visual context, with inconsistent color representation potentially altering interpretation. 6. Glare and reflections : Screen surfaces and environments can cause glare and reflections,

18. affecting visual context and eye comfort. 7. Digital eye fatigue : Prolonged screen use causes digital eye fatigue, leading to blurred vision, dry eyes, and decreased visual context comprehension. 8. Attention and distraction : Screen-based content can be distracting, reducing focus and altering visual context interpretation. 9. Context switching : Frequently switching between screens and tasks can decrease productivity and alter visual context understandin g .

19. 10. Accessibility : Screen use can impact accessibility for individuals with visual impairments, necessitating accommodation like screen readers . When using computers, tablets, o r hand-held devices, we should be able to clearly distinguished the displayed information. It is important to properly calibrate those screens to provide adequate contrast and resolution for legibility.

20. Device screens may be too bright or too dim, adjust the brightness to the setting that is comfortable. Additionally, minimize direct and indirect glare produced by bright source that either directly enters your line of sight , or indirectly by reflecting off screens. Glare greatly strains the eyes by impeding the ability to properly perceive visual information.

21. CONCLUSION Light, ergonomics, and screen use significantly impact visual context. By recognizing these effects, we can take steps to reduce the severity of potential negative impacts and create more comfortable and effective visual experiences.

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