Neutralize It Like It's Hot
This is the first thing you adjust before beginning lens neutralization.
What is the eyepiece (ocular) focus?
If the axis shifts from 090 to 180, this is the degree of change.
What is 90 degrees?
This refractive error occurs when light focuses in front of the retina.
What is Myopia?
Vertical prism is prescribed for misalignment in this direction.
What is up and down (vertical deviation)?
This instrument is used to measure the power of eyeglass lenses.
What is the lensometer?
The axis of a cylindrical lens is measured in these units.
What are degrees?
This refractive error occurs when light focuses behind the retina.
What is hyperopia?
This is the state of perfect vision where light focuses directly on the retina.
What is emmetropia?
Base-out prism is typically used to help patients with this condition.
What is esotropia?
What is the axis wheel?
If the mires are decentered from the target, this may be present.
What is prism?
If the lens is not positioned correctly over the optical center, this optical effect may occur.
What is induced prism?
This refractive error involves two different meridians with unequal power.
What is astigmatism?
Base-in prism moves the image in this direction.
What is toward the base (out)?
This component holds the glass steady and prevents rotation during measurement.
What is the lens clamp (holder)?
When neutralizing a spherical lens, the lensometer mires should appear like this when properly focused.
What are 3 skinny, sharp lines?
The prescription measurement that indicates the strength of nearsightedness or farsightedness.
What is sphere?
This age-related condition reduces near focusing ability.
What is presbyopia?
When looking through a base-down prism, the image appears displaced in this direction.
What is upward?
This lensometer control is rotated to align the mires when determining the axis of cylinder during neutralization.
What is the axis wheel?
You neutralize sphere at +2.00 and cylinder at +3.50 X 060. Change this to minus cylinder form.
What is +5.50 -3.50 X 150?
When converting from minus cylinder to plus cylinder form you do these three steps.
What is: add the cylinder to the sphere, change the sign of the cylinder to plus, and rotate the axis 90 degrees?
This type of astigmatism occurs when one principal meridian is myopic and the other is hyperopic.
What is mixed astigmatism?
The two components used to describe prism in a prescription.
When transposing a prescription from +2.00 -1.00 X 155 to plus cylinder, this is the new prescription.
What is +1.00 +1.00 x 065?