OBJECTIVE INSTRUMENTS

Question 1

used to measure the anterior curvature of the cornea.

Answer 1

Keratometer (B &L)

Also known as:
CI Ophthalmometer (AO)
Universal Ophthalmometer (Javal-Schiotz)

Question 2

What are the functions of Lensometer?

Answer 2

Used to find the ff:
a. Effective power of spheres & cylinders
b. Power & direction of prism
c. Axis of cylindrical lenses optical center of lenses
d. Power of bifocal segments used for setting & marking a lens for cutting, etc.

Question 2

used for viewing the interior portion of the eye particularly the fundus to rule out pathology

Answer 2

Ophthalmoscope (Funduscope)

Question 2

What are the other names of Lensometer

Answer 2

Vertometer (B & L), Lensmeter (Japan), Refractionometer (Carl Zeiss - Germany)

Question 2

used to measure the diameter of the pupil & interpupillary distance (P.D.)

Answer 2

Pupillometer (Centrometer)

Question 3

a microscope to which beamsplitter & illuminated reticle have been added that is used to measure contact lenses

Answer 3

Radiuscope

Question 4

used to measure the refractive error of the eye basing on the fundus reflex movement.

Answer 4

Retinoscope (Skiascope)

Question 5

a biomicroscope used in diagnosis of eye conditions

Answer 5

Slit lamp biomicoscope

Question 6

What are the structures observed in the slit lamp biomicroscope?

Answer 6

lid margins, cilia, puncta,
caruncle, conjunctiva, cornea, ant. Chamber, limbus,
aqueous, ant. Lens capsule, iris & pupil margins

Question 6

used to measure intra-ocular pressure (IOP).

Answer 6

Tonometer

Question 7

Consists of a biomicroscope used in conjunction with a
prismatic contact lens, for viewing the filtration angle of the anterior chamber

Answer 7

Gonioscope

Question 8

What are the three types of Tonometer

Answer 8

Schiotz, Goldmann, Tono-pen