Why we prescribe glass… Able to detect hypermetropia & myopia… Subjective correction child patient… The sequence of prescription writing… Practical events of glass prescription writing procedure

1. GLASS PRESCRIPTION
WRITING PROCEDURE
Md.Azizul Islam
Junior Optometrist (Oculoplasty)
Ispahani Islamia Eye Institute & Hospital
IIEI&H
IIEI&He-mail: ajijulislam513@yah00.com
twiter: @ajijulislam513 , Cell:01724-310486

2. Aims of Today,s Class…
To know……
Why we prescribe glass…
 Able to detect hypermetropia & myopia…
Subjective correction child patient…
The sequence of prescription writing…
Practical events of glass prescription
writing procedure …
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3. Why We Prescribe Glasses
Majority of patients in our OPD comes
with complaints of...
VISUAL
SYMPTOMS
OCULAR
SYMPTOMS
REFFERED
SYMPTOMS
• BLURRED VISSION
• DIPLOPIA
• CONFUSION
HEADACHE
• ASTHENOPIA
• EYE STRAIN
• OCULAR
IRRITATION
• PAIN
• In child
intractable
blepharitis &
conjunctivitis
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4. Sequence of Prescription
HYPEROPIA Age
Fogging
Refinement methods
1. Less than 3yrs ------- Full Correction
2. 3 to 8yrs -------------- depends on Tropia(Full Gross
Value subjective)or Phoria (Full net- optimal, undercorrection)
3. Adults to follow rule of subjective refraction
 MYOPIA
1. Thumb rules
Normal Patients
• -1 to -6 full
correction
• >-6
undercorrect
Esotropia
• -6 DS or Above
under correct
to optimal
Exotropia
• Over correct
Exotropia
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5. Hyperopic/Myopic/Astigmatism...
Normal Patients
 In child less than 3 yrs of age = 1.25DS regular
 Older than 3 yrs. = all astigmatism should be
corrected
 Child and young : followed up 6 monthly
 Adults : 6 month to yearly
 Frequent changes : over correct (0.25D)
 Every patients suspected of refractive error
should be checked Dry and Wet Refractive error.
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Sequence of Prescription

6. Some Examples
We prescribe Spherical power on the basis of
Wet R.E
Cylindrical power on the basis of dry R.E
 3yrs old boy with dry R.E
RE +5.0 DS +1.0 DC@140
LE +6.0 DS+ 0.75 DC@70
wet R.E, RE +4.75 DS + 0.75DC@15
LE +6.25 DS + 0.50 DC@70
Patient with phoria
Prescribed glass
RE +4.0 DS +0.5 DC@140
LE +5.0DS +0.25DC @ 70
 5Yrs Boy with Amblyopia (Dry)
R.E
RE +0.25 DS + 0.50DC @137 ,VA 6/6
LE +5.25DS + 0.75DC @55 , VA 6/36
Prescribed Glass
RE Plano,VA 6/6
LE +3.50DS, VA 6/18 with proper
occlusion and follow up
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7. CONTD…
 High refractive errors
12 Yrs old girl with dry R.E,
RE -5.25 DS -0.25 DC@35 v 3/60
LE -4.75DS -1.50 DC@155 v 3/60
Wet R.E ,RE -5.0DS -0.50DC@30
LE -4.25DS -1.50DC@150
Prescribed glass
RE -4.75 DS v 6/6
LE -4.50DS -0.50DC @160
v 6/9
18yrs old boy with dry R.E,
RE -0.25DS -4.75 DC@6 v 3/60
LE -0.50DS -4.0DC@177 v3/60
Wet R.E, RE +0.25DS -4.75DC@05
LE +0.25DS-4.0DC@177
Prescribed glass
RE -3.75 DC@05 v 6/9
LE -3.25DC@180v 6/9
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8. CONTD...
 Small errors with eye strain
15 yrs boy with Dry R.E,
RE +1.0 DS +0.25 DC@80 v 6/6p
LE +1.25 DS +0.50 DC@104 v 6/6 p
Wet R.E, RE +3.5DS +0.75DC@70
LE +3.25DS +0.50DC@100
Prescribed glass
RE +2.0DS V 6/6
LE+1.75DS v 6/6p
(Full +latent Hyper )
19yrs girl with Dry R.E
RE -0.75 DC@87 v 6/6 p
LE -0.75DC@92 v 6/6p
Wet R.E, RE +0.75 DC@175
LE +0.75 DC@180
Prescribed glass
RE -0.50DC@90 v 6/6
LE -0.50 DC@90 v 6/6
(subjective correction)
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9. Glass Prescription Form
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10. Reg No: 2831345 Date: 26.01.9
Age: 27 yrs
Name: Mr.Azizul islam
Sph: Spherical power
Cyl: Cylindrical
Power
Axis: Which way
the astigmatism
Remarks: Unifocal/
Bifocal/Trifocal/Progr
essive/ Varilux etc.
I.P.D: Inter pupillary
Distance
V.A.R : VA R/E
V.A.L : VA L/E
Signature
Glass Prescription Point of View

11. Various Prescription Form
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12. Some Prescribed Form
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13. Remarks
 Single Vision glass/Unifocal
 Single Vision Lenticular
 Bifocal KT/FT
 Trifocal/Executive
 Progressive
 Progressive Essipal
 Progressive Transitions
 Varilux Liberty
 Varilux Comfort
 Varilux Airwear
 Photochromic
Description Coting/Criteria
Clear
ARC
MC
HC
HMC
Titus
Crizal UV
Crizal Prevencia
Crizal Forte UV
Tinted

14. Take Home Messages
Useful for long Computer user also protect
from computer vision syndrome
Can be prescribe comfortably to myopic
with presbiopia
Better lens materials. Today's progressive
lenses are available in all the latest lens
materials, making them thinner, lighter and
more comfortable than ever before.
 Progressives made of high-index plastic
lens materials can be up to 50% thinner than
standard plastic bifocals.
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15. References
Clinical Procedures in Optometry( journal 2011)
A Hand Book of Basic Optometry & Refraction.
Optics & Refraction , A K Khurana.
Pic: Internet (Google).
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16. Question
Please……
.
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17. IIEI&H