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Optometric abbreviations

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Abbreviations are often used in optometric practice, and there have been attempts to compile lists of acceptable abbreviations. This article will try to collate this information in one area and also, where appropriate, indicate if the abbreviation may be region specific.

This idea was originally inspired by a thread on the optometry discussion board, theOptom.com which showed an overwhelming desire for such a source.

Eye examination terms  
Abbreviation Term
AC Anterior chamber
AC 4/4 grade 4 Anterior chamber angle
AC 3/4 grade 3 Anterior chamber angle
AC 2/4 grade 2 Anterior chamber angle
AC 1/4 grade 1 Anterior chamber angle
AC 0/4 grade 0 Anterior chamber angle (closed)
AC/A Accommodative convergence/ accommodation ratio
Acc Accommodation
Ad Advised
Add Addition
AIT After-image transfer
ALT Alternating
ALT SOT Alternating esotropia
ALT XOT Alternating exotropia
ARC Anomalous retinal correspondence
A/V Arteriole/Venue ratio
BE Both Eyes
BIO Binocular Indirect Ophthalmoscopy
BSV Binocular single vision
BV Binocular vision
BVD Back vertex distance
BVP Back vertex power
CD Centration distance
C/D Cup/disc ratio
CF Count fingers vision – state distance
c/o or c.o. Complains of
CT Cover test
c/u Check-up
CW Close work
Δ Prism dioptre
D Dioptres
DC Dioptres cylinder
DNA Did not attend
DOB Date of birth
DS Dioptres sphere
DV Distance vision
DVD Dissociated vertical divergence
EF Eccentric fixation
FB Foreign body
FD Fixation disparity
FF Foveal fixation
FHG Family history of glaucoma
FMH Family medical history
FOH Family ocular history
F/U Follow up appointment
GH General health
G(M)P General (medical) practitioner
HA Headaches
HARC Harmonious abnormal retinal correspondence
HM Hand motion vision – state distance
Hx History
IOL Intra-ocular lens implant
IOP Intra-ocular pressure
ISNT Inferior, Superior, Nasal, Temporal (rule used to assess optic disc appearance)
K Keratometry
LE Left eye
LHyperT Left hypertropia
LHypoT Left hypotropia
LO’s Lenticular opacities
L/R FD L/R fixation disparity
L/R L hyperphoria
LSOT Left esotropia
LVA Low vision aid
MDU Mallett distance unit
MNU Mallett near unit
M.Wing Maddox Wing
MR Maddox Rod
NCT Non-contact tonometer
ND Neutral density filter
NPL No perception of light
NPC Near point of convergence or no previous correction
NRC Normal retinal correspondence
NV Near vision
NWT Normal wearing time
o symptoms Zero symptoms
φ Horizontal orthophoria
θ Vertical orthophoria
θ Horizontal & Vertical Orthophoria
OC’s Optical centres
Occ. Occupation
od oculus dexter (right eye)
OH Ocular history
OMB Oculo motor balance
ONH Optic nerve head
Oph Ophthalmoscopy
os oculus sinister (left eye)
ou oculus utro (each eye)
PD Pupillary distance
PERRLA Pupils equal, round, reactive to light and accommodation
PH Pinhole
PL Perception of light
POH / PrOH Previous ocular history
PPA Peri-papillary atrophy
Px Patient
RAPD Relative afferent pupillary defect
RE Right eye
Ret. Retinoscopy
RHyperT Right Hypertropia
RHypoT Right Hypotropia
RNFL Retinal nerve fibre layer
RPE Retinal pigment epithelium
RSOT Right Esotropia
Rx Prescription
SLE Slit lamp examination
SLM Slit lamp microscope
SOP/ESOP Esophoria
SOT/ESOT Esotropia
Supp. Suppression
V Vision (unaided)
VA Visual acuity (corrected)
VAL Left visual acuity
VAR Right visual acuity
VDU Visual display unit
VF Visual field
VPS Variable prism stereoscope
WD Working distance
X/12 X months
X/52 X weeks
X/7 X days
XOP/EXOP Exophoria
XOT/EXOT Exotropia
NB: NAD is frequently used but is not recommended  
Clinical condition terms  
Abbreviation Term
AMD/ARMD Age related macular degeneration
ACG/CAG Angle closure glaucoma
BDR Background diabetic retinopathy
BP Blood pressure
BRAO Branch retinal artery occlusion
BRVO Branch retinal vein occlusion
Cat Cataract
CLAPC Contact lens associated papillary conjunctivitis
CLARE Contact lens associated red eye
CLPU Contact lens associated peripheral ulcer
CNS Central nervous system
CRAO Central retinal artery occlusion
CRVO Central retinal vein occlusion
CVA Cerebrovascular accident
Dx Diagnosis
dDx Differential Diagnosis
DR Diabetic retinopathy
ESR Erythrocyte sedimentation rate
Fx Family History
GPC Giant papillary conjunctivitis
Hx Hospital
HES Hospital Eye Service
IDDM Insulin dependent diabetes mellitus
IRMA Intra-retinal microvascular abnormality
KCS Keratoconjunctivitis sicca
KP Keratic precipitates
LASEK Laser epithelial keratomileusis
LASIK Laser in situ keratomileusis
LTG Low tension glaucoma
MI Myocardial infarction
MS Multiple sclerosis
NIDDM Non-insulin dependent diabetes mellitus
NRR Neuro retinal rim
NS Nuclear sclerosis
NTG Normal tension glaucoma
PDR Proliferative diabetic retinopathy
PDT Photodynamic therapy
PK Penetrating keratoplasy
POAG Primary open angle glaucoma
PPDR Preproliferative diabetic retinopathy
PRA Pan retinal ablation
PRK Photorefractive keratectomy
PRP Pan retinal photocoagulation
PSCC Posterior sub-capsular cataract
PVD Posterior vitreous detachment
RD Retinal detachment
RK Radial keratotomy
RP Retinitis Pigmentosa
SEAL Superior epithelial arcuate lesion
SLK Superior limbic keratoconjunctivitis
SPK Superficial punctate keratitis
SPEE Superficial punctate epithelial erosions
Sx Symptoms
TIA Transient ischaemic attack
T1 diab Type 1 diabetes
T2 diab Type 2 diabetes
Tx Treatment
Vx Vomiting
Contact lens terms  
Abbreviation Term
BC Base curve
BOZD Back optic zone diameter
BOZR Back optic zone radius
BVP Back vertex power
CLAPC Contact lens associated papillary conjunctivitis
CLARE Contact lens associated red eye
CLPU Contact lens associated peripheral ulcer
Dk Unit of permeability
DW Daily wear
EW Extended wear
FOZD Front optic zone diameter
FVP Front vertex power
HEMA Hydroxyethyl methacrylate
HT Handling tint
HVID Horizontal visible iris diameter
K Keratometry
MWT Maximum wearing time
OS/OD Overall size/overall diameter
OZD Optic zone diameter
PMMA Polymethyl methacrylate
RGP Rigid Gas Permeable
SCL Soft contact lens
SiH Silicone hydrogel
SEAL Superior epithelial arcuate lesion
SLK Superior limbic Keratoconjunctivitis
SPK Superficial punctate keratitis
SPEE Superficial punctate epithelial erosions
TBUT Tear break up time
Tc Centre thickness
TD Total Diameter
Te Edge thickness
TWT/WTT Today wearing time
VPA Vertical palpebral aperture
WT Wearing time
Pharmacy and drug terms  
Abbreviation Term
A.d. As directed
b.d/b.i.d. Twice a day
GSL General sales list
Gutt/g Guttae (drops)
Meds Medications
Nocte At night
Occ Ointment
o.d Once a day
otc Over the counter (bought medication)
P Pharmacy (drug)
POM Prescription only medicine
p.r.n. When required
q.d.s./q.i.d. Four times a day
Rx Prescription
t.d.s./t.i.d. Three times a day
Eye Examinations types / enhanced care schemes  
Abbreviation Term
DFE Dilated Fundus Examination
DFP Digital Fundus Photograh(y)
DRS Diabetic Retinopathy Screening
GIES Glasgow Integrated Eyecare Scheme
HIES Highland Integrated Eyecare Scheme



Published - December 2008

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