Prescription AnalysisPregunta 44 de 100
Hand neutralization of an unknown lens uses what technique?
a.Measuring edge thickness
b.Weighing the lens
c.Moving the lens and observing target movement to add opposite power
d.Reading the frame stamp
Explicación
In hand neutralization, an optician moves the lens across a target line; the direction of apparent movement indicates plus or minus, and trial lenses of opposite power are added until movement stops.
Practica las 100 preguntas gratis — sin registro.
Preguntas relacionadas de este tema
- Compensated (effective) power differs from the prescribed power mainly due to what?
- A -8.00 D lens is moved closer to the eye. Its effective minus power does what?
- Neutralizing a lens with a lensmeter finds what point?
- With-the-rule astigmatism typically has the cylinder axis oriented near what?
- An Rx reads OD +1.50 -0.50 x 090, OS +1.50 -0.50 x 090, Add +2.25. What is the near power in each eye?
- Prism prescribed as '2 base out' in each eye is used to help with what?
Última revisión: · proceso editorial
Equipo Editorial de PrepPass · Verificado con ABO (American Board of Opticianry) Certified Optician Exam · Cómo revisamos