6. • Black adrenochrome deposits
• Conjunctival injection
• Dec tear production
• Foreshortening of the conjunctival fornices
and scarring
• Bleb
• Episcleral vessel dilation
• staphyloma
10. 1. diagnostic- identify abnormal angle
structures and estimate the width of the AC
2. Surgical- LTP, goniotomy
Visualize the anterior chamber
Eliminates tear- air interface
Prevents total internal
reflection
11. DIRECT GONIOSCOPY INDIRECT GONIOSCOPY
Koeppe, Barkan-Hoskins, Goldmann, Zeiss, Susman,
Swan Jacob Possner
done under EUA (supine) clinic setting (sitting)
may examine eye one eye at a time
simultaneously needs slit lamp
needs handheld confusing mirror image
biomicroscope, light
source
direct image
12. Goldmann-
needs coupling agent
Stabilizes the globe
Clearest visualization of the AC
Useful for LTP
Zeiss, Posner, Sussman-
Four- mirror goniolens
No need for coupling agent
Useful for indentation gonioscopy
13.
14. Koeppe
Useful for fundus exam
Useful in patients with nystagmus or irregular
cornea
15.
16.
17.
18.
19. Angular width of the angle recess
peripheral iris contour
Insertion of the iris root
20. Pressure is applied to the cornea aqueous
humor forced into AC
Appositional closure- (+) force opening
Synechial closure- remain closed
Partial synechial closure- partially open/ closed
21. Scleral spur and schwalbe’s line- most
consistent
Superior quadrant- narrowest
Inferior quadrant- widest
Pigmentation- most marked in the inferior
angle
22. Faint red line in the posterior TM
Episcleral venous pressure > IOP
Hypotony
Elevated episcleral venous pressure
23. IRIS PROCESS PAS
Open and lacy More solid or sheet-like
Follows the normal Composed of iris
curve of the angle stroma
Structures visible in the Obliterate the angle
open space b/n recess
processes
24. Increases with age
Darkly pigmented iris
PDS
PES
Malignant melanoma
trauma
Uveitis/inflammation
Surgery
hyphema
25. PDS PES
Uniform pigmentation Patchy pigmentation
Finer pigment (+) sampaolesi line
26. Wide ciliary body band
Increased prominence
of the scleral spur
Torn iris process
Variation of ciliary face
width and angle depth
in different quadrants
27.
28. Early glaucomatous changes
Loss of axons,blood vessels and glial cells
29. MECHANICAL THEORY ISCHEMIC THEORY
Direct compression of Decresed optic nerve
axonal fibers perfusion
Distortion of the LC plates Intraneural ischemia
Interruption of axoplasmic
flow
Death of RGC
30. DIRECT OPHTHALMOSCOPE INDIRECT OPHTHALMOSCOPE
Small pupil Uncooperative patients,
Detection of NFL media opacity, high myope
No stereosopic detail Can detect ON cupping but
less pronounced with slit
lamp method
Magnification- is
inadequate
31. Hruby lens, 60, 78 or 90 D lens
Can detect subtle changes in ONH
High magnification, excellent illumination,
stereoscopic view
Quantitative measurement of the diameter of the
disc
▪ 60D= x 1
▪ 78D= x 1.1
▪ 90D= x 1.3
32. 1. Generalized enlargement of the cup
2. Focal enlargement of the cup
3. Superficial splinter hemorrhage
4. Loss of NFL
5. Translucency of the neuroretinal rim
6. Developmenmt of vessel overpass
7. Asymmetry of cupping b/n patient’s eyes
8. Peripapillary atrophy ( beta zone)
33.
34. Cup disc ratio
Measure vertical and horizontal
diameter
Large disc- large cup
▪ Eg myopia, aging, blacks
N- < 0.3
5% - 0.6
Asymmetry of >0.2 -?
35. Notching or narrowing of the rim
Inferior and superior temporal poles
36. Linear red streak on or near the disc
Usually located inferotemporally
May clear over weeks to months– localized
notching of rim and VF loss
NTG more likely to have hges
Prognostic sign for development or
progression of VF loss
38. • Tissue between the cup and border
• Orange or pink
• ISNT rule
• More translucent in glaucoma
39. Alpha zone-
irregular hyper and hypopigmentation of the RPE
Temporal crescent seen in myopia
Seen in normal subjects
Beta zone
Choriocapillaries and RPE loss
Choroidal vesels and sclera visible-
white appearance
More common in glaucoma patients
40. Nasalization of vessels
Laminar dot sign
Bayoneting
Baring of circumlinear vessels
Narrowing of peripapillary retinal veseels
Pale and excavated cup in advanced stages
44. Measures differential light sensitivity or the
ability of the subject to distinguish a stimulus
light from background illumination
Assess the visual field
1. Identify abnormal visual field
2. Quantitative assessment of normal or abnormal
fields to guide follow- up care
45. 1. short wavelength automated perimetry-
blue- yellow perimetry
2. Frequency- doubling technology- uses a
low spatial frequency sinusoidal grating
undergoing rapid phase reversal flicker
Simulates M cells
3. Visually evoked cortical potentials and
electroretinography- assess RGC function
46. KINETIC STATIC
Moving stimulus of Non moving stimuli of
fixed intensity and size varying intensity
Simple confrontation, Henson, Octopus,
tangent screen, Lister Humphrey
perimeter, Goldmann automated
perimeter
manual
47. Traquair’s Island of vision
Island of sight surrounded by sea of darkness
49. Almost always localized
Respects the horizontal meridian
Begins nasal to the blind spot
almost always detectable within the central
30
Structural loss precedes VF loss
50% RNFL loss before VF defect develops
53. Relative depression of
one horizontal
hemifield compared
with the other
54. Near complete loss of
the superior or inferior
VF
Advanced GON
55. 1. Fixation
2. Stimulus luminance
3. Size of stimulus
4. Presentation time
5. Patient refraction
6. Pupil size
7. Wavelength of background and stimulus
56. Numerical-
threshold for all points checked
Grey scale-
decreasing sensitivity is represented by darker
tones
Each change in grey scale tone is equivalent to 5
dB
Total deviation-
deviation of the patient’s result from age
matched controls
57. Pattern deviation
Adjusted for any generalized depression in the
overall field
Probability values
P indicates the significance of the defects
< 5%, < 2%, < 1%, and < 0.5%
The lower the P- greater clinical significance
58.
59. Fixation losses-
indicate steadiness of gaze during the test
False positives-
detected when a stimulus is accompanied by a
sound
Trigger happy patients
Grey scale print out appears pale
> 33%- unreliable
60. False negatives-
detected by presenting a stimulus much brighter
than threshold at a location where sensitivity has
already been recorded
Indicates inattention or tiredness
May also be an indicator of disease severity
Grey scale print out has a clover- leaf shape
> 33% unreliable
61. Mean deviation- measure of overall field loss
Pattern standard deviation- measure of focal
loss or variability within the field taking into
account any generalized depression in the hill
of vision
62. Miosis- decreases threshold sensitivity in the
peripheral field and increases variability in
the central field
Lens opacities
Uncorrected refractive error
Lens rim
Ptosis
Inadequate retinal adaptation
63. 1. Optic disc less cupped than expected for the
degree of VF loss
2. Pallor> cupping
3. Progression of VF loss is excessive
4. Pattern of VF loss is uncharacteristic for
glaucoma
5. Location of VF loss does not correspond to
the location of cupping or thinning of neural
rim