Physics Questions
Explore questions in the Physics category that you can ask Spark.E!
The aspheric lens design can do all of these EXCEPT: A) reduce peripheral aberrationB) reduce magnificationC) reduce FOVD) reduce lens weight/thicknessE) reduce ring scotomaF) improve appearance.
The retinal image size for a corrected axial or refractive hyperope is _______ compared to their uncorrected state.
True or False. A ring scotoma can be entirely eliminated if certain factors are changed appropriately.
Which of the following are not optical and/or physical considerations of high plus lenses? A) increased weightB) increased thicknessC) increased lens aberrationsD) decreased FOVE) ring scotomaF) increased magnificationG) decreased ocular rotationsH) increased prismatic effect leading to convergence demands
All of the following can increase a ring scotoma EXCEPT: A) decrease lens sizeB) increase lens power C) increase lens thicknessD) increase base curve
A base to center prismatic effect generates a _______. It is a defect formed by last refracted ray to enter the lens and first unrefracted ray to tenter the eye from lens margin.
All of the following are used to reduce magnification of a high hyperope lens. However, which one is not the best option because it can increase aberrations? A) thinner lens (decrease t) B) flattening front curve (decrease F1 = base curve) C) reduce vertex distance (decrease d)
________ is the linear distance between the far point and the near point of the eye.
______ are multiple rings seen just inside the edge of high minus lenses. It is caused by internal reflections and is noticeable to observer.
What type of lens may cause a minified appearance of the eyes? A) high plus lensB) high minus lens
Which of the following is NOT a concern for high minus lens wearers? A) weightB) thicknessC) minification (decreased retinal image size) D) ring of scotoma E) reflections of lens edges F) all the above are concerns
Modified version of a myodisc and differs from myodisc via form of back surface of carrier (more curved).
_______ is the Dioptric difference between the far point and the near point of the eye.
The ______ is the outside area of little of no power in a lenticular lens. Lenticular allows for thickness and weight reduction.
What am I describing? Cylinder on the front surface. Plano carrier. Aperture (bowl) is 30mm diameter.
Which is worse for high myopes? A) nasal decentrationB) temporal decentration
How can edge reflections be minimized? A) higher index material B) A/R coatingC) edge coatingD) polishing and rolling the edge E) all the above
The retinal image size for a corrected axial or refractive myope is _______ compared to their uncorrected state.
In a myodisc as lens power and/or aperture diameter increase -> carrier thickness ______.
The ______ is the central area with prescribed lens power in a lenticular lens.