Slides Of Eye Anatomy Flashcards
What are the palpebrae ?
The eyelids
Meet at the medial and lateral canthus
Which muscle inervatred by CN VII closes the eyelid
Orbicularis oculi
Which muscle innervated by CN III opens the upper eyelid
Levator Palpebrae superiores
Which muscle innervated by the sympathetic ANS ascites in opening the eyelids?
associated with fear and surprise
Muellers muscle
What are the three concentric spheres of the globe of the eye ball
Fibrous tunic
Vascular tunic
Nervous tunic
What is the “front window of the eye” and is the major refractive surface of the eye
Cornea
2/3 of the refractive power
What is the sclera
White coat of the eye
What is the name of the structure where the sclera meets the cornea
Limbus
What is the function of the iris
Regulates light into the eye
And is the colored part of the eye
What is the innervation of the pupil
ANS innervation
Sphincter – Parasympathetic ANS
Dilator – Sympathetic ANS
What is the differnce of the palpebral and bulbar conjunctiva
Palpebral covers the inside of the eyelids
Bulbar covers the sclera
What is the function of the ciliary body
Produces the aqueos humor through the ciliary processes
What is the muscle that allows for the focus of near objects
Ciliary muscle
What is the location of the choroid
Located between the sclera and the retina
Provides blood supply to the outer retinal layers
The anteroir chamber is located between the
Cornea and the iris
What is the refractive power of the lens
1/3
What is the “fundus” or the neural lining of the inside of the eye
Retina
Contains 9 layers
Contains the rods and cons
What is the structure at the posterior pole of the retina
That is responsible for fine, central vision
And contains of third of all nerve fibers
Macula
Are there any rods or cones in the optic disc?
No this is the physiological blind spot
Roughly 15 degrees temporally
How many rectus muscles are there of the eye
4
SR, LR, MR ,IR
How many oblique muscles are there of the eye
2
SO and IO
What are the 3 layers of tears
Oil (outer layer)
-Meibomian Glands
Water (middle)
- Lacrimal
- Accessory Lacrimal
Mucin (inner layer)
-Goblet cells
Meds that cause dilation are called..
Mydriatics
Define emmetropia
Normal State
Objects at infinity are seen clearly with the unaccommodated eye
Define Hyperopia
Farsighted
The axial length of the eye is too short causing the image to fall behind the retina
Define Myopia
Nearsighted
The axial length of the eye is too long causing the image to fall in front of the retina
Define astigmatism
Elliptical shape
Refracting power of the cornea and lens is different in one meridian that the other
Refractive errors in the horizontal and vertical axis differ
Define presbyopia
Loss of accommodation
Loss of the ability to focus on near objects is the typical manifestation
Caused by progressive hardening of lens and the loss of ability to change shape
A minus on a prescription means
Myopia
A plus on a prescription means
Hyperopia
How is a Eye Rx written for glasses
Sphere,-cylinder x axis
What is an eye that is orthophoric
No deviations of the eye
What is heterophoria
Normal deviations
Not presents on cover uncover test
What is heterotropia
Deviated eyes when using both eyes
Found with cover uncover test
What is the fornix of the eye
The spot that the bulbar and palpebral conjunctiva meet
Define keratitis
Inflammation of the cornea
What are the layers of the cornea
Epithelium
Bowman’s membrane
Stroma
Descemet membrane
Endothelium
What is the function of the sclera
Protection
What is the thickest part of the sclera
The posterior part
What is the episcelra joined to
Joined to Tenon’s capsule by strands of connective tissue
Tenon’s capsule is a sheet of dense connective tissue that encases the globe
Forms sleevelike sheaths that cover the tendons at EOM insertions
What is the highest protein concentration of any body tissue
The lens
What are the three layers of the lens
Capsule
Cortex
Nucleus
