1. Structure of
the eyeball
วัตถุประสงค์ ...
- บอกโครงสร้างสำคัญของตาได้

2. Structure of the eyeball

3. Iris & Pupil Diaphragm Constriction Light reflex
Exclude periphery of the lens
Increase depth of focus
Light reflex
Direct & consensual
dilate seconds (dim light)
constrict seconds (bright light)

4. Intraocular Pressure - Ciliary body aqueous humor
anterior chamber trabeculae
canal of Schlemn (venous channel)
mmHg
- Glaucoma
- Open-angle
(wide angle)
- Angle-closure
(narrow angle)

5. Lacrimal glands … Roles of the Eye … Lubrication - lid movement
Good optical surface
Wash out noxious agents
Lysozyme - bactericidal action
… Roles of the Eye …
Optical instrument - retinal image
Physical mechanism
Sensory receptor - nerve impulse
Physiological mechanism

6. Protective Mechanisms
Bony wall of the orbit
Eyelids
Protective eyelid closure reflexes; corneal,
dazzle, menace reflexes
Spontaneous blinking
Tonic contractions of orbicularis - during sleep
Voluntary lid closure
Eyelashes (cilia) - Blink reflex

7. Resources : 2. Formative evaluation I 1. VDO files
- The Human eye 6:20
The important parts of the eye (cornea, iris, pupil, eye lens, retina,
blind spot)
Accommodation of the eye and Power of accommodatiom
Near point, Far point of the eye, cataract
Range of vision
2. Formative evaluation I