Reading a Prescription Flashcards
OD means…
Right eye
OS means…
Left eye
Nearsightedness means…
See better NEAR than far
Farsightedness means…
See better FAR than near
Astigmatism means…
Patients with astigmatism have distortion of vision in addition to blurring of vision
SPH
What does it stand for, what are the possible values, and what do each of the possible values mean?
Sphere- Main correction
>> *N*egative values indicate *n*earsightedness, while positive values indicate farsightedness.
>> “PL” or “DS” in place of a numerical value means that there is no correction- 0.00- for the sphere.
CYL
What does it stand for, what are the possible values, and what do each of the possible values mean?
Cylinder- For astigmatism CYL must both be negative or both be positive for OS and OD
Axis
What does it stand for, what are the possible values, and what do each of the possible values mean? How does it relate to CYL?
Axis of tilt- for astigmatism >> 0-180 (no negatives) >> Cannot have Axis without CYL or CYL without Axis
ADD
What does it indicate, and what do we do with that information?
Add power- for reading (ignore)
Prism
What does it indicate, and what do we do with that information?
Information for muscular eye strain- We don’t fill these!
PD
What does it indicate, and how do we find it?
Pupillary Distance- mm’s between pupils >> Use the pupillometer
Plano
What does it mean?
No correction
What does it mean if Sphere is “PL”?
No correction
What does it mean if Sphere is “DS”?
No correction
Which type of prescriptions do we not accept?
No contacts, no PRISMs
What are the prescription restrictions for sphere?
Must be between -10 and +6. We can’t do more than -10 or +6
What are the prescription restrictions for cylinder?
Must be between -4 and +4 We can’t do more than +/-4
Is this in range? What, if anything, should you communicate to the customer?
Yes!
You should discuss high index with them though
Is this in range? What, if anything, should you communicate to the customer?
No :(
SPH OD is too high
Is this in range? What, if anything, should you communicate to the customer?
Yes!
They need high index.
Is this in range? What, if anything, should you communicate to the customer?
Yes!
You should talk to them about high index.
Is this in range? What, if anything, should you communicate to the customer?
No :( OD Sphere is too high
Is this in range? What, if anything, should you communicate to the customer?
No :( OD Cylinder is too high
Does this Rx have Astigmatism?
Yes! CYL and Axis
Does this Rx have Astigmatism?
Nope! No CYL or Axis
Can we fill this?
Nope! It has a PRISM
How can you identify a contact lens Rx?
By the added columns BC and DIA
Describe a multifocal Rx
