Refractive Errors
Opthalmic term that refers to a refractive error being present
What is Ametropia?
This part of the patient prescription indicates whether or not they are Myopic or Hyperopic
What is the Sphere power?
-7.50 +3.25 x180
Identify the type of Astigmatism
What is Compound Myopic Astigmatism?
This lens is used in the correction of Hyperopia
What is a Plus Lens
This lens design features one power and it usually used for the distance prescription
What is a single vision lens
Described as condition in which images comes to focus behind the Retina
What is Hyperopia or Hypermetropia?
This part of the patient's prescription indicates whether or not the patient is Astigmatic
What is Cylinder power?
+3.75-5.50 x059
Identify the type of Astigmatism
What is Mixed Astigmatism
This lens is composed of two prisms places apex to apex thus forming a concave shape
What is a Minus lens?
This lens design simultaneously features correction for both distance and near work as the wearer looks through their lens
What is a Bifocal?
Described as the condition in which the light comes to focus on two different locations within the eye due to the curvature of the Cornea
What is Astigmatism?
This part of the prescription is an additional corrective power used for near work
What is the ADD power?
+10.00 +1.75 x145
Identify the type of Astigmatism
What is Compound Hyperopic Asitgmatism?
This lens converges light
What is a Plus lens?
This lens design features a seamless flow of both distance near correction with intermediate range included
What is a Progressive lens?
Associated with the loss of the ability to accommodate due to stiffen of the crystalline lens and ciliary muscles
What is Presbyopia?
This part of the Prescription is the horizontal measurements between the center pupils of the patient
What is Pupillary Distance
-6.25 +-6.25 x043
Identify the type of Astigmatism
What is Simple Myopic Astigmatism?
This lens has against motion movement
What is a Plus lens?
A feeling that a multifocal wear may experience as they move their eyes from the distance portion to the near segment
What is Image Jump?
Known as the bending of light
What is Refraction?
This part of the prescription is usually prescribed to patient with eye alignment problems. It is written in decimals and always accompanied by base direction
What is Prism?
Provide a solid definition of Flat Transposition
What is the conversion used to change a prescription from plus cylinder to minus cylinder form?
This lens forms a real image
What is a Minus lens?
This lens is used for correction of Simple Myopic Astigmatism
What is a Cylinder lens