Opthalmics Flashcards
T/F?
NON-STERILE products are used for instillation of the eye.
False
STERILE
Name the 4 types of sterile products intended for instillation into the eye?
- Solutions
- Suspension
- Ointments
- Ophthalmic inserts
What are the 5 drug classes used in the eye?
- anti-inflammatory
- antibiotic
- vasoconstrictors
- miotics
- mydriatics
What parts of the eye are considered transparent media with no blood vessels? (3)
- cornea
- lens
- vitreous
How are oxygen and nutrients transported to non-vascular areas throughout the eye?
aqueous humor
Name the following volumes:
Tear Volume(eye moisture)-
How much volume can the eye hold-
Eye drop volume
Tear volume- 7 uL
Eye holds- 10 uL
Eye drop- 50-75 uL
Ophthalmic solutions are normally packaged in multiple dose containers that contain what?
preservatives
What are the 3 types of functional uses for contact lenses?
- corrective
- cosmetic
- therapeutic
What are the 3 types of lenses available?
- soft
- hard
- rigid gas permeable
Which type of lenses uses a hydrogel such as (HEMA- hydroxytethyl methacrylate)?
Soft lenses
Transscleral iontophoresis is used under what circumstances?
for drug targeting to posterior segment of eye
What are the 2 type of contact lens solution?
- Multi-purpose: rinsing and storage agent
- Enzymatic cleaning, disinfection, and neutralization
vasoconstrictors?
remove redness in the eye (should not be used chronically)
miotics?
constrict the pupil
mydriatics?
dilate the pupil–> to see the back of the eye
An eye drop contains 50-75 uL, although the eye can only hold 10uL. Where does the extra volume go?
drained off by nasolacrimal drainage (nose and throat)
What is the purpose of increasing the viscosity?
to increase how long the contact is in contact with the eye
_____ drugs are better absorbed in the body
unionized
Of the products used for instillation which has the highest increased contact time?
ophthalmic inserts
What has allowed extended wear of contact lenses due to high oxygen permeability?
silicone hydrogel
