List of optometric abbreviations

Short description: None

Certain abbreviations are current within the profession of optometry. They are used to denote clinical conditions, examination techniques and findings, and various forms of treatment.

## Contents

* 1 Eye examination terms
* 2 Clinical conditions terms
* 3 Contact lens terms
* 4 Pharmacy and drug terms
* 5 Examination types and enhanced care schemes
* 6 External links

## Eye examination terms

Abbreviation  | Term  | Description (notes)

|
|

AC | Anterior chamber | fluid-filled space between the iris and the endothelium
AC 4/4 | Grade 4 anterior chamber angle | open angle between cornea and iris
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 angle between cornea and iris
AC/A | Accommodative convergence / Accommodation ratio  | the portion of the range of convergence that occurs in response to accommodation
Acc | Accommodation | process of changing optical power to maintain focus as distance changes
Ad | Advised |
Add | Addition  |
AIT | After-image transfer  |
ALT | Alternating  |
ALT ET/SOT | Alternating esotropia  |
ALT XT/XOT | Alternating exotropia  |
ARC | Anomalous retinal correspondence  |
A/V | Arteriole–venue ratio  |
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 deviation  |
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  |
IOP | Intra-ocular pressure  |
ISNT | Inferior, Superior, Nasal, Temporal  | rule used to assess optic disc appearance
K | Keratometry  |
OS  | oculus sinister (left eye)  |
LHyperT or LHT | Left hypertropia  |
LHypoT | Left hypotropia  |
LO | Lenticular opacity  |
L/R FD | L/R fixation disparity  |
L/R | L hyperphoria  |
Left ET | Left esotropia  |
LVA | Low vision aid  |
MDU | Mallett distance unit  |
MNU | Mallett near unit  |
M.Wing | Maddox Wing  |
MR | Maddox rod  |
NB: NAD | No abnormality detected  | (is frequently used but is not recommended)
NCT | Non-contact tonometer  |
ND | Neutral density filter  |
NLP | No light perception  | No light perception is considered total visual impairment, or total blindness; see Visual impairment
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  |
⊕  | Horizontal and 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 uterque (both eyes)  |
PD  | Pupillary distance  |
PERRLA  | Pupils equal, round, reactive to light and accommodation  |
PH  | Pinhole  | see Pinhole occluder and Visual acuity
PHNI  | Pinhole No Improvement  | see Pinhole occluder and Visual acuity
PHVA  | Pinhole Visual Acuity |
PL  | Perception of light  |
POH / PrOH  | Previous ocular history  |
PPA  | Peri-papillary atrophy  |
Pt  | Patient  |
RAPD  | Relative afferent pupillary defect  |
OD  | Right eye (oculus dexter)  |
Ret.  | Retinoscopy  |
RHyperT  | Right hypertropia  |
RHypoT or RHT  | Right hypotropia  |
RNFL  | Retinal nerve fibre layer  |
RPE  | Retinal pigment epithelium  |
RSOT  | Right esotropia  |
Rx  | Prescription  |
SE  | Spherical Equivalent |
SLE  | Slit lamp examination  |
SLM  | Slit lamp microscope  |
EP  | Esophoria  |
ET  | Esotropia  |
Supp.  | Suppression  |
V  | Vision (unaided)  |
VA  | Visual acuity  |
VA Dcc - VA Dsc  | Visual acuity with Distant chart with correctors  | Visual acuity with eye chart at Distant 20 feet (6 m) and with (cc: Latin cum correctore) correctors (spectacles); Dsc is without (sc: Latin sine correctore) correctors. See Visual acuity
VA Nsc - VA Ncc  | Visual acuity with Near chart without correctors  | Visual acuity with eye chart at Near 15.7 inches (400 mm) and without (sc: Latin sine correctore) correctors (spectacles); Ncc is with (cc: Latin cum correctore) correctors. See Visual acuity
VA OS  | Left visual acuity  |
VA OD  | 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  |
XP  | Exophoria  |
XT  | Exotropia  |

## Clinical conditions terms

Abbreviation  | Term  | Description (notes)

|
|

AH  | Asteroid hyalosis  |
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/CLIPC  | Contact lens associated/induced papillary conjunctivitis  |
CLARE  | Contact lens associated red eye  |
CLPU  | Contact lens associated peripheral ulcer  |
CNS  | Central nervous system  |
CNV  | Choroidal neovascularization |
CRAO  | Central retinal artery occlusion  |
CRVO  | Central retinal vein occlusion  |
CSR  | Central serous retinopathy  |
CVA  | Cerebrovascular accident  |
Dx  | Diagnosis  |
dDx  | Differential diagnosis  |
DR  | Diabetic retinopathy |
ERM  | Epiretinal membrane  |
ESR  | Erythrocyte sedimentation rate  |
FTMH  | Full thickness macular hole  |
FMNS  | Fusion maldevelopment nystagmus syndrome  | (Latent nystagmus)
Fx  | Family history  |
GPC  | Giant papillary conjunctivitis  |
Hx  | Hospital or History  |
HES  | Hospital eye service  |
IDDM  | Insulin dependent diabetes mellitus  |
ILM  | Internal limiting membrane  |
IRMA  | Intra-retinal microvascular abnormality  |
KCS  | Keratoconjunctivitis sicca  |
KP  | Keratic precipitates  |
LASEK  | Laser epithelial keratomileusis  |
LASIK  | Laser in-situ keratomileusis  |
LTG  | Low-tension glaucoma  |
MH  | Macular hole  |
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  |
PXF  | Pseudoexfoliative syndrome  |
RD  | Retinal detachment |
RK  | Radial keratotomy  |
RP  | Retinitis pigmentosa |
SEAL  | Superior epithelial arcuate lesion  |
SLK  | Superior limbic keratoconjunctivitis  |
SMH  | Submacular hemorrhage  |
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  | Description (notes)

|
|

BC  | Base curve |
BOZD  | Back optic zone diameter  |
BOZR  | Back optic zone radius  |
BVP  | Back vertex power  |
CLAPC/CLIPC  | Contact-lens-associated/induced 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  | Description (notes)

|
|

A.d.  | As directed  |
bd/bid  | Twice a day  |
gt  | One drop  |
gtt  | drops  |
GSL  | General sales list  |
Gutt/g  | Guttae (drops)  |
Meds  | Medications  |
Nocte/QHS  | At night  |
Occ  | Ointment  |
od/QD  | Once a day  |
otc  | Over the counter (bought medication)  |
P  | Pharmacy (drug)  |
POM  | Prescription-only medicine  |
prn  | When required  |
q  | Every (e.g. q2h – every two hours)  |
qds/qid  | Four times a day  |
Rx  | Prescription  |
tds/tid  | Three times a day  |
ung  | Ointment  |

## Examination types and enhanced care schemes

Abbreviation  | Term  | Description (notes)

|
|

DFE  | Dilated fundus examination  |
DFP  | Digital fundus photograph(y)  |
DRS  | Diabetic retinopathy screening  |
GIES  | Glasgow Integrated Eyecare Scheme  |
PEARS  | Primary Eyecare Acute Referral Scheme  |
WEHE  | Welsh Eye Health Examination  |
WLVS  | Welsh Low Vision Service  |

## External links

* The College of Optometrists Members' Handbook (PDF)
* theOptom.com
* Optometry Acronyms and Abbreviations

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