5 Pupillary Optics

Question 1

What forms the aperture stop of the eye? What’s the opening of the aperture stop called? The aperture stop is designed to absorb light

Blue and green irises only have granules in what? Opposed to brown eyes having granules in stroma as well

Answer 1

Iris!
Pupil.

Epithelium.

Question 2

The following is the description of the iris:

1. ______ undesirable light (pigmented tissue
2. __________ retinal illuminance (pupil size and layers)
3. Controls ______of_____ (smaller pupil)
4. Helps in controlling retinal ____ (diffraction and aberrations)
5. Help _____ optical instruments (entrance and exit pupil)

Answer 2

Stops
Regulates
Depth of field
Blur
Design

Question 3

What part of the optical system is the image of the aperture stop formed in object space?? (Image formed by cornea). An erect, virtual image is formed 0.5mm in front of real pupil

What part is the image of the aperture stop formed in the image space? (Image formed by the lens)

Answer 3

Entrance pupil

Exit pupil

Question 4

Regarding field of view, if light distribution is in the central visual field, this is due to _____ response.

You get ____ response, if light distribution in peripheral visual field

Pupil response to changes in light level is mediated by both ___ and ____ receptors

Answer 4

More
Less

Rod. Cone

Question 5

What’s the most important factor affecting pupil size?

What is the pupil’s response to an increase in this factor?

Latency with low _________ it’s 0.5s before constriction. With increased ___________ latency decrease to 0.2 or 0.3s.

Pupil is demented by 0.5mm nasally relative to _______ axis

Answer 5

Illumination

Decrease pupil size.

Illumination. Illumination

Optical

Question 6

A decrease in pupil size increases what? It’s the range of differences over which the system’s detector cannot detect any change in focus. For the human eye, it’s between _._D and _D

Answer 6

Depth of field. 0.5D and 1D

Question 7

Pupil size ______ with age.

What drugs cause pupil dilation? Constriction? Systems they work on?

Pleasant emotional state tends to ________ pupil size while unpleasant state ________ pupil size

Answer 7

Decreases

Dilation: mydratics which stimulate sympathetic system.

Constriction: miotics which stimulate parasympathetic system

INCREASE HAPPPPPPY

Decrease, sad and studying

Question 8

Alignment of the Eye’s _________ pupil with external systems _______ pupil to maximize the _____ of _____ of the optometrist.

The microscope is the ____ pupil of the optometrists eye and the ______ pupil is the front of Dr.’s Eye.

Answer 8

Entrance. Exit. Field of view

Exit. Entrance