ODP: Spectacle Final Exam

Which will have the most reflection, a lens with the index of?

1.71

The standard AR coating is how thick?

1/4 wavelength

How long should an office retain an adult patient's records before properly disposing?

10 years

Approximately how fast does light travel in air?

186,000 miles per second

What is the power of a lens that has a focal length of 50 cm?

2.00 D

Calculate vertical decentation of a bifocal when the frame has a B measurement of 50mm and a segment height of 28mm.

3 mm up

What type of optical material will disperse light?

All materials with non-parallel sides

When beginning a standard alignment on a frame:

Always start with the bridge

A 23 year old patient has come into the office with their new single vision glasses and they are complaining of a pulling sensation in their right eye. What is the instrument that the optician needs to use to solve this patient's problem?

Pupilometer

What is the tolerance on a single vision pair of eyeglasses with a Rx +7.50 OU?

+/- 2%

The front curve of a lens is +7.00, the back curves of this lens are -3.00 and -4.00. What are the true powers?

+4.00 and +3.00

Transpose this prescription: +3.25 +1.00 x 180

+4.25 -1.00 x 90

Using the Rule of Thumb corrected base curve theory, what would be the base curve for a +2.00 -1.00 x 180 lens?

+6.00

A lens has a base curve that has a focal length of 40 inches, and an ocular curve with a focal length of 10 inches. What is the diopter power of this lens?

-3.00

What are the true powers of this prescription? -5.00 -0.50 x 90

-5.00 @ 090 and -5.50 @ 180

A patient's PD was mistakenly noted to be 62 mm when the actual measurement is 66 mm. If the power of the lenses are -2.00 diopters in each eye, how much prism will be induced in the finished spectacles and in which direction is the base?

0.8 total BO

How far will a 1 diopter prism displace an image?

1 cm

To what index is the lens clock calibrated?

1.530

How much pantoscopic tilt should be applies to most frames for good cosmetics?

8 to 10 degrees

To test a lens using the drop ball test, what is commonly used?

A 5/8-inch steel ball

Which occupation may need increased UV protection?

A dental technician

*Who can determine a type of problem with an Amsler grid?

A patient, doctor, or optician

If the right eye wire is attracted higher than the left, what is the problem?

A skewed bridge

What is often provided by progressive lens manufactuers?

A specialized decentration grid

What is fusion?

Ability to merge two images into one

This is the phenomenon of the crystalline lens changing shape:

Accommodation

Which of the following should be avoided when cleaning a Zyl frame?

Acetone

Which of these would be canceling prism?

BI and BO

When reading a right lens on the lensometer, assuring that frame placement and lensometer is correctly set, the optician sees the optical center in quadrant 4. What might this indicate?

Base in or down prism

A patient calls to complain about their new single vision glasses. They are experiencing halo effects around headlights while night time driving. What is the first step the optician should take?

Check their order to confirm they have an anti-reflective coating

Give the simple definition of a bridge?

Connects the two eye wires

What is the highest point of a wave called?

Crest

What material has an index of 1.523?

Crown glass

An elderly lady can no longer read her favorite mystery novels with ease. What is an added value step to take for this patient?

Demonstrate a floor stand type of magnifier that will allow enlarged viewing while making it easy to turn the pages.

A patient has an asymmetric face due to an unfortunate accident. As an eyecare professional, what special step can you take for this patient?

Demonstrate an adaptation that can be made to a frame for a more comfortable fit

A pair of spectacles reads as having 1 diopter of induced base in prism on the right eye and 1 diopter of induced base out prism on the left eye. Which of these actions is appropriate?

Dispense the spectacles

DBL is mostly correctly defined as:

Distance between lenses

What is one way to reduce remakes and refunds?

Double checking a patient's measurements

*When measuring a frame to determine lens MBS, what is possible?

ED could be diagonal

Which frame measurement is often made diagonally in the eyewire, but could actually be located in a different direction?

Effective diameter

What changes when vertex distance changes?

Effective power

Which patient has normal vision?

Emmetrope

Define FVD:

Fitted vertex distance

When is vertex distance compensation mandatory?

For a spectacle lens Rx over +/-7.00 diopters

What type of pricing is common for calculating retail frame prices?

Formula pricing

Which of the following is a part of inventory management?

Frame board management

How is the round face described?

Full with equal height and width

What entity regulates the use and disclosure of private health information?

HIPPA

What do the initials HEV stand for?

High energy visable

What is another term for hypermetropia

Hyperopia

What is shrikage?

Inventory that is not accounted for physically, but shows up in the inventory report

Wavelengths immediately surrounding the visible range are considered:

Invisible light

What should be part of the eyewear dispensing process?

Inviting the patient back for adjustments and repairs

What is true about a biconcave lens?

It has a minus power base curve

Which of these is a type of refractive surgery?

LASIK

What is one method of creating a polarized lens?

Lamination

How is bridge size checked?

Lift the frame slightly to the side and the bridge 1mm of space on the opposite side is seen

Which is a true statement about an optical prism?

Light is always bent toward the base

Which refractive error results in part of the image in front of the retina and part behind the retina?

Mixed astigmatism

Rods provide:

Peripheral vision

If three lenses have the same curves and thickness, which will be the strongest?

Polycarbonate

What is an important part of dispensary management?

Proper hygiene and sanitation

Your patient has an intraocular lens replacing the crystalline lens. This is:

Pseudophakia

What measurement is located at approximately 40 centimeters, or 16 to 18 inches?

Reading vision

What is likely the cause if a patient has to hold their head up or lift their glasses up to read clearly out of the near?

Seg height is too low

When a patient has a cornea with two curves and the image is formed partly on the retina and partly in front of the retina, the patient has ______________ astigmatism.

Simple myopic

Which of these is a monocular deficiency?

Simple myopic astigmatism

A lens clock will verify ______:

Slab-off

What is a noncorrosive frame material of

Stainless steel

Which medication can increase the damage cause by UV radiation?

Sulfonamides

An optical office can only be successful when all of its eye care professionals are _________.

Team players

Of these, which frame measuring system is most accurate?

The boxing system

A 5 year old child has been prescribed his first eyeglasses prescription. The prescription is +5.00 OU. What is one piece of advice the optician can give to the child's parents?

The child will likely show signs of adapting to the prescription such as wanting to take them off in the beginning.

How is binocular PPD measured?

The distance between the center of the right pupil to the center of the left pupil

What will surround and hold lenses in place?

The eyewire

According to HIPPA, who is held legally accountable for the products, services, and information dispensed to the public?

The healthcare professional working with them

What is the Bowman's layer of the cornea?

The layer located between the epithelium and the stroma

Three basic properties of a lens can create more power. Which of these is one such property?

The lens thickness

How will moving a -5.00 diopter lens 10.00 mm closer to the eye affect the patient?

The lens will be 0.50 D too strong and the patient may experience undefined discomfort

Compensated power means ___________________.

The power ordered from the lab to correct for a vertex distance need

When adding a plus and minus number together, what holds true?

The result could be either minus or plus

The photosensitive cells are located in:

The retina

Your patient complains that his eyeglass lenses have become scratched, although he has never dropped them. On examination, small hairline scratches are apparent. What is a possible cause?

They have been repeatedly cleaned with a dry facial tissue

What is an advantage of a polarized lens?

They reduce glare for the wearer

What is an important indication that your patient is happy with the service received at your dispensary?

They refer a friend

The action of reading will cause the patient with average eyes to:

They will converge about 3 to 6 mm in and 8 to 10 mm down

Why would an optician split prism?

To achieve a more balanced appearance.

Which of the following can indicate a patient has glaucoma?

Tonometer measurements

What is a major problem caused by anirdia?

Too much light enters the eye at all times

Under the auspices of which federal agency does OSHA belong?

U.S. Department of Labor

A patient thought that photochromic lenses would help with overall brightness when driving and is disappointed that the lenses will not darken. What is the reason for this

UV light causes the lens to darken, and car windshields stop the UV rays from entering

This is the "B" measurement:

Vertical measurement of box enclosing lens area

How dark is a tint that is categorized 4?

Very dark

A minus lens has what type of focal point?

Virtual

Donating to the Lion's Club is an example of:

Waste management

What is commonly used to verify lens measurements on a progressive pair of eyeglasses?

Watermarks on lenses, centration chart and PD stick

What is the relationship between diopter and focal length?

When one increases, the other decreases.

The eyelashes are ultra sensitive to touch and ______.

Will cause the eyelids to blink if an object gets too close

What is one possible way to change the Pantoscopic angle on a frame?

With a finger piece or parallel plier

According to many experts in the customer service field, how quickly will a client make an assessment of you?

Within 7 seconds