ODP 1 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS COMPLETE STUDY
GUIDE
●● What is the index of refraction of the cornea?
Answer: 1.376
●● What is the typical optical zone diameter of a corneal alignment fit?
Answer: 8.0 mm
●● What are the layers of the corneal from inside out?
Answer: Endothelium, Descemet's membrane, Stroma, Bowman's Layer,
Epithelium
●● Who Will Likely need corrective lenses at a younger age?
Answer: A myope
●● Where can the chemical make-up of a hydrogel lens be found?
Answer: Package insert
●● How long should a soft lens be allowed to settle on the eye before
evaluation the fit?
, Answer: At lest 20 minutes
●● Scleral lenses should be inserted:
Answer: Directly on the cornea
●● What type of astigmatism may be revealed when a rigid contact lens
is applied?
Answer: Lenticular
●● At what power do you make adjustments for vertex distance?
Answer: + or - 4.00
●● How can a flat cornea, even down to 31.00 diopters, be measured?
Answer: With the use of a -1.00 trial lens
●● What instrument is used to determine the power of a rigid contact?
Answer: Lensometer
●● What is the primary funtion of the digital corneal topographer?
Answer: Measure the curvature of the cornea
●● A special lens with a soft holder lens and a rigid center used to treat
keratoconus is called:
CORRECT ANSWERS COMPLETE STUDY
GUIDE
●● What is the index of refraction of the cornea?
Answer: 1.376
●● What is the typical optical zone diameter of a corneal alignment fit?
Answer: 8.0 mm
●● What are the layers of the corneal from inside out?
Answer: Endothelium, Descemet's membrane, Stroma, Bowman's Layer,
Epithelium
●● Who Will Likely need corrective lenses at a younger age?
Answer: A myope
●● Where can the chemical make-up of a hydrogel lens be found?
Answer: Package insert
●● How long should a soft lens be allowed to settle on the eye before
evaluation the fit?
, Answer: At lest 20 minutes
●● Scleral lenses should be inserted:
Answer: Directly on the cornea
●● What type of astigmatism may be revealed when a rigid contact lens
is applied?
Answer: Lenticular
●● At what power do you make adjustments for vertex distance?
Answer: + or - 4.00
●● How can a flat cornea, even down to 31.00 diopters, be measured?
Answer: With the use of a -1.00 trial lens
●● What instrument is used to determine the power of a rigid contact?
Answer: Lensometer
●● What is the primary funtion of the digital corneal topographer?
Answer: Measure the curvature of the cornea
●● A special lens with a soft holder lens and a rigid center used to treat
keratoconus is called:
