Outcome 2 Describe Properties of Lens Design Flashcards
1
Q
Lens Aberrations
A
As a change of light wavelength causing an image to not be clear
2
Q
Aberrations Can Be Grouped Into Two Major Types :
A
- Chromatic is colour related
- Monochromatic occurs from one colour or one wavelength
3
Q
The BASE CURVE meaning
A
For example a sunglass frame will dictate what prescription can be used for optimal vision and patient satisfaction
4
Q
The VOGEL’S FORMULA meaning
A
For example
5
Q
ASHPERIC LENSES front surface
A
- reduces aberrations (improving lens optics )
- improving cosmetic appearance of the lens
- produces a thinner and more lightweight lens
6
Q
ATORIC LENSES
A
7
Q
FREEFORM LENSES
A
- are customized lenses that fit the patients needs.
- digital lens
- improved distance vision
- smart lens
- improved vision for prism , high minus and plus
- improved vision when unusual base curves are used
8
Q
Optometrists and Opticians who refracts write prescription
A
in minus cylinder form
9
Q
Ophthalmologists write cylinder
A
in a plus form
10
Q
A
