05/09/2025
وظيفة كل عدسه
1. Sphercal lens.
A.posetive use for detection of hyper , presbyopia
B.negative use for detection of myopia
2.cylinder lens.
A.posetive use for detection of hyper , presbyopia and astigmatism
B.negative use for detection of myopia and astigmatism
3. Prismatic lens.
A. Light analysing and refraction
B.detection of strabismus
4.obaque lens.
Use to cover the eye that is not under examination
5-Pinhole
Use to distinguish if hyperphyesical caused by refractive error or pathological change
6-Stenopeic.
Use for astigmatism inspection
7-Cross cylinder.
Use for detection of axial posetion or cylinder power of cylindrical lens
8-Maddox.
Diagnosis phoria
-Plano.
Use to test simulated blindness
9-Frosted.
Used by children to replace opaque
10-Filter
Used for chromatoptometry
بصرياتيون _Optometrist's وظائف بصريات #بصريات