09:31

Astigmatism: The sine squared formula

03:30

What a person with astigmatism sees, Part 2

10:12

Optics of the eye 3: Lens effectivity

03:08

Optics of the human eye, part 2

09:44

Optics of the human eye - part 1

02:19

Using a lensometer part 2 , measuring prism

00:58

Test for Color Blindness

03:26

Using a lensometer part 1 - measuring glasses prescription

04:00

What does a person with astigmatism see?

04:35

Astigmatism example problem

06:13

Examples of adding and subtracting prisms

09:48

Prentice Rule: Example Problem

03:47

Astigmatism: Interval of Sturm

06:13

Prentice's rule

04:04

Prism orientation part 2

02:35

Prescribing prisms

04:50

Prism orientation part 1

01:40

Prism diopter

02:06

Prisms

03:13

calculations using vergence 2

03:12

calculations using vergence 1

02:18

Sign conventions vergence

02:55

Intro to vergence

02:13

Astigmatism: sphere and cylinder componets in optical crosses

01:00

Automated Phoropter

00:29

Air Puff Test

01:53

What's the best human vision

02:54

Index of refraction

01:21

Astigmatism and Spherical equivalent.

01:52

Astigmatism types part 3.

03:38

Astigmatism types part 2.

05:54

Astigmatism types part 1

05:06

Optics video 2

07:09

Optics video 1

01:44

conversion between plus "cyl" and minus "cyl" astigmatism

03:19

Astigamtism eyeglasses prescription video 2

07:03

astigmatism eyeglasses prescription video 1

02:38

What is legal blindness?

02:04

What is age related macular degeneration?

01:35

What is diabetic retinopathy?

03:40

what is glaucoma?

01:42

what are cataracts?

02:46

what is presbyopia?

04:01

what is Astigmatism?

02:25

what is farsighted?

01:44

What is nearsightedness?

02:39

What is 20/20?

06:06

Optical Aberrations, a review for LensCrafters doctors

04:05

What is Astigmatism

05:20

what is 20/20 vision (more detailed)

01:55

What is the "air puff" test

12:21

what is astigmatism?