National Vision Lvl 2 Certification

Retinoscope

Which tool shines a beam of light onto the retina to allow the OD to examine its movement? This tool allows the OD to place various lenses in front of the eye until movement stops, which helps determine the correct prescription for the patient

Transilluminator

Which hand tool is useful for examining the sclera (white of the eyeball) to detect the presence of ocular tumors and access the anterior chamber and eyelids?

Conjunctiva

What is the term for the mucous membrane that lines the inside of the eyelids and the exposed part of the eyeball?

Crystalline lens

What is the term for the major refracting body of the eye which has an approximate power of 17 diopters and gives the eye its power of accommodation?

Extraocular Muscles

Six muscles outside of the eyelids that attaches to Tenon’s Capsule and the sclera. These muscles are responsible for all movements of the eye

Visual Fields

For patients wearing contact lenses, which procedure should be performed before the patient removes them?

True

The Optic Nerve begins at the optic disc and takes impulses from the retina to the brain

The outer layer, middle layer, and the inner layer

What are the three main layers of the eye?

True

When first interacting with a patient, you should professionally introduce yourself as the optometric technician

Optic Disc

Part of the retina where the optic nerve enters. This point of the eye where the eye creates a blind spot

Glaucoma

Which condition occurs when intraocular pressure inside the eye is too high, affecting both the optic nerve and images transmitted to the brain

Blepharitis

Inflammation of the eyelids caused by malfunctioning of the oil glands in the lids near the base of the eyelashes

Stye

Condition that appears as a swollen, reddish bump on the edge of an eyelid caused by bacterial infection and inflammation of the meibomian gland

Periorbital Cellulitus

Common infection and/or inflammation of the eyelid and portions of skin around the eye? This can be caused by bacteria, viruses, and other pathogens

Basal tears, reflex tears, emotional tears

What are 3 types of tears

Pterygium

Raised, wedge shaped growth of the conjunctiva that extends into the cornea

Color vision deficiency

The inability to distinguish shades of color

Monovision

A contact lens fitting where your dominant eye is fitted with a lens of optimum distance vision and your non dominant eye is fitted with a lens optimized for near vision

Axis

On a CL Rx, what is only used when there is astigmatism correction? The component is measured in degrees from 001 to 180

Concentric multifocal lens

Which contact lens features a prescription in the center for distance and one or more alienating rings of power surrounding it in a “bull’s eye” pattern?

Segment bifocal

Which multifocal contact lens is usually made of rigid (GP) material with the reading portion located at the bottom?

Aspheric lens

Which contact lens has a gradual power change from the most plus (add power) in the center of the lens to the distance prescription located near the edge of the lens, or vice versa?

Astigmatism

Refractive error that causes different focal lengths in different planes on the cornea, resulting in blurred vision at distance and near

Base curve

Curve used as a base of a series of powers or the degree of curvature of the front surface of a le

With both eyes

“Binocular” refers to which of the following?

Canthus

What is the term for the angle at either end of the slit of the eyelids

Cones

Retinal cells that are responsible for color vision, daytime vision, and central portion of the visual field

Fusion

Process where the brain combines images captured from both eyes into a single image

Abnormal sensitivity to light

This describes photophobia

Presbyopia

This condition starts at age 35, it results in the gradual loss of accommodation

Prism

Tool that consists of a transparent solid with 2 nonparallel plane faces and is used to change light’s direction

Ptosis

Paralytic drooping of the upper eyelid

Visual fields test

Additional procedure that should be recommended in the pre test room if pt has history of glaucoma

Pupillary distance

Distance between the center of the pupils, whether in distance or near positions

UV blocking lenses

Effectively protects eyes from sun damage

Integrity

The trait of being honorable, righteous, and straightforward

Recognize individual differences

Best way to show respect

Twice a day

On a prescription, BID stands for

Focal power of the cornea

43 diopters

When a patient has an issue with their eyewear, whether upon dispense or later

When is it necessary for an optician to troubleshoot a problem before sending the patient back to see the OD

Endothelium, stroma, and Bowman’s layer

Some of the five membranes of the cornea

False

When referring to contact lenses, the base curve is the peripheral portion of the back surface of the contact lens

False

It is ok to remove the instrument body case, attempt to repair, or perform interior maintenance on any technician equipment that needs repair

Anterior chamber

Fluid filled chamber that occupies the space between the back of the cornea (posterior surface) and the front of the iris (anterior surface)

Aqueous humor

Clear fluid that provides nutrients for the lens and the posterior cornea, maintains intraocular pressure, and carries away waste products

Limbus

Border or margin of a structure, especially the junction of the cornea and sclera in the eye

Working days

In the contact lens reference guide, WD stands for

Geniculate body

Point in the brain that marks the end of the optic nerve. Where images are transmitted to the correct portion of the brain to be recognized

True

Both the upper and lower eyelids have a punctum

Pinguecula and pterygia

Growths on the sclera (white part of the eye) due to excessive sun exposure