Visual Sense – SS1 Visual Arts Lesson Note (First Term)

The visual sense, also called sight or vision, is the ability to perceive and interpret visual information from the world around us.

Behavioural objectives

By the end of the lesson, students should be able to:

1. define the visual sense and list the abilities it includes;
2. describe how the eyes and brain work together to produce sight;
3. state the effect of basic shapes, lines and visual hierarchy in a design;
4. explain the meaning of colour gradation, blending, contrast, harmony and discord;
5. distinguish between fluorescence and phosphorescence.

What does the visual sense include?

The visual sense includes seven abilities: colour perception, form and shape recognition, depth perception, motion detection, pattern recognition, object recognition and spatial awareness.

• Colour perception: the ability to see and tell different colours apart.
• Form and shape recognition: the ability to identify and recognise shapes and forms.
• Depth perception: the ability to judge depth and distance.
• Motion detection: the ability to notice movement and follow moving objects.
• Pattern recognition: the ability to recognise patterns and textures.
• Object recognition: the ability to recognise and name objects.
• Spatial awareness: the ability to understand how objects are placed in relation to one another in space.

Why is the visual sense important?

• Daily activities: reading, driving and recognising faces depend on sight.
• Finding our way: sight helps us understand and move through our surroundings.
• Art and design: sight is a key part of artistic appreciation, design and creativity.

How does the visual sense work?

The eyes capture light and send signals to the brain, where the signals are interpreted as images.

1. Light reflects from an object and enters the eye through the cornea.
2. The pupil lets light in, and the iris changes the size of the pupil.
3. The lens focuses the light onto the retina at the back of the eye.
4. Rods and cones in the retina change the light into nerve signals.
5. The optic nerve carries the signals to the brain.
6. The brain interprets the signals as colour, shape, distance and movement.

What are rods and cones?

• Rods: light-sensitive cells that work in dim light and detect light and dark.
• Cones: light-sensitive cells that work in bright light and detect colour and fine detail.

What are the dynamics of basic shapes?

The dynamics of basic shapes are the ways simple shapes create visual interest, carry meaning and guide the viewer’s eye.

Points, lines, planes and volumes

• Points: draw attention and create focus.
• Lines: lead the eye and create movement.
• Planes: create depth and define space.
• Volumes: occupy space and create mass.

Form and structure

• Symmetry: creates order and stability.
• Asymmetry: creates tension and dynamism.
• Proportion: creates harmony and balance.

What is visual hierarchy?

Visual hierarchy is the arrangement of elements in a design so that the viewer notices the most important element first.

• Size: a larger element creates emphasis and shows importance.
• Colour: a strong colour creates contrast and draws attention.
• Position: placing an element in a key spot creates focus and guides the eye.

Balance and contrast

• Balance: creates stability and harmony.
• Contrast: creates visual interest and emphasis.

Movement and direction of lines

• Horizontal lines: create calmness and stability.
• Vertical lines: create dynamism and a feeling of rising upward (aspiration).
• Diagonal lines: create tension and energy.

Shape and symbolism

• Circles: represent unity and wholeness.
• Squares: represent stability and structure.
• Triangles: represent balance and harmony.

What are the nuances of colour mixture?

Nuances of colour are the subtle effects that appear when colours meet, mix or interact with light on the surface of objects.

What is the difference between colour harmony and colour discord?

• Colour harmony: colours sit well together and please the eye.
• Colour discord: colours clash and strain the eye.

What is the difference between fluorescence and phosphorescence?

• Fluorescence: a material absorbs light and re-emits it at a different wavelength, and the glow stops when the light source stops.
• Phosphorescence: a material absorbs light and re-emits it slowly, so the glow lasts for some time after the light source stops.

Evaluation

1. Define the visual sense.
2. List the seven abilities that the visual sense includes.
3. State the effect of horizontal, vertical and diagonal lines in a design.
4. What is the difference between colour harmony and colour discord?
5. How does fluorescence differ from phosphorescence?

Assignment

Design a simple poster that uses a circle, a square and a triangle, then write a short note under it.

1. State the idea each of the three shapes represents.
2. Explain what visual hierarchy is.
3. Name the three ways you used it to make one shape stand out.