Parallelpiped (Direct Focal/ Broad Beam)

Question 1

What is Parallelpiped?

Answer 1

The process of scanning the entire eye area providing an overview that will prompt further investigation with more elective forms of illumination.

Broad view of anterior and posterior corneal surfaces

Used to determine the fit of a contact after Fx is instilled

Most used direct illumination technique

Question 2

What are you looking at with Parallelpiped?

Answer 2

More specific layers of tissue

Corneal scarring, infiltrates and corneal staining

Question 3

Describe the beam in Parallelpiped:

Answer 3

45-50 deg angle

width 1-3 mm

Height usually Max

Low-mod illumination

Low-med magnification

Question 4

Answer 4

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Question 5

Answer 5

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Question 6

Answer 6

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Question 7

Talking points on Parallelpiped:

Answer 7

Most commonly used direct illumination

Permits assessment of the location, width and height of any object within the cornea or adjacent structures.

Used to determinte the fit of a contact lens

used to observe tear film and cornea