PRETEST KULIAH DASAR-DASAR LASER

Type of laser machine that use as laser treatment for retinal disease are…

• Argon blue-green laser, krypton red, yellow laser, diode

• Argon blue-green laser, eximer laser, yellow laser, diode

• Yellow laser, krypton red, Co2-laser, diode

• Yellow laser, krypton red, Nd-YAG laser, diode

Laser parameters that influence the effect of treatment, except…

• spot size

• duration

• chromophore

• power

Wavelength that can be used to treat proliferative retinopathies are…

• Green and yellow laser

• Green and red laser

• yellow laser

• Infrared only

The mechanism of action of laser photocoagulation induced resolution, except...

• Oxygen can diffuse directly into inner retina

• destruction of oxygen-consuming photoreceptors

• increases oxygen tension and decreases hypoxia cause vasodilatation

• RPE can produce cytokines that antagonize the permeabilizing effects of VEGF

The first line treatment for high risk PDR is…

• Anti VEGF injection

• Panretinal Photocoagulation (PRP)

• Focal laser coagulation

• Vitrectomy pars plana

The frequency of doubled Nd:Yag-Laser is…

• 532 nm

• 332 nm

• 523 nm

• 325 nm

The green Laser well absorbed by…

• Xantophill

• melanin and haemoglobin

• Bruch’s membrane

• Foveal

What is the mechanism of thermal interaction of Laser?

• Photocatalysis

• UV Discociation

• Plasma Ionization

• Increase in temperature

How much the spot size of Panretinal Photocoagulation?

• 400 μm

• 500 μm

• 100 μm

• 300 μm

The frequency of TheArgon Blue-Green laser is…

• 488-514 nm

• 488 nm

• 514 nm

• 322-488 nm