Orthoptics is a profession allied to the eye care profession. Orthoptists are the experts in diagnosing and treating defects in eye movements and problems with how the eyes work together, called binocular vision. These can be caused by issues with the muscles around the eyes or defects in the nerves enabling the brain to communicate with the eyes. Orthoptists are responsible for the diagnosis and non-surgical management of
strabismus
Strabismus is a vision disorder in which the eyes do not properly align with each other when looking at an object. The eye that is focused on an object can alternate. The condition may be present occasionally or constantly. If present during a ...
(cross-eyed), amblyopia (lazy eye) and eye movement disorders.
[International Orthoptic Association document "professional role"] The word ''orthoptics'' comes from the
Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
words ὀρθός ''orthos'', "straight" and ὀπτικός ''optikοs'', "relating to sight" and much of the practice of orthoptists concerns disorders of binocular vision and defects of eye movement. Orthoptists are trained professionals who specialize in orthoptic treatment, such as eye patches, eye exercises, prisms or
glasses
Glasses, also known as eyeglasses or spectacles, are vision eyewear, with lenses (clear or tinted) mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms (known as temples or ...
. They commonly work with paediatric patients and also adult patients with neurological conditions such as stroke, brain tumours or multiple sclerosis. With specific training, in some countries orthoptists may be involved in monitoring of some forms of eye disease, such as glaucoma, cataract screening and diabetic retinopathy
[Vukicevic, M., Koklanis, K and Giribaldi, M. ''Orthoptics: Evolving to meet increasing demand for eye service''. In Insight news. March 2013: Sydney, Australia.]
Effectiveness
For children, there is evidence that orthoptics is more effective at treating
convergence insufficiency than home-based pencil or computer training; for adults the effectiveness is less evident.
History
Orthoptics has a long history in supporting ophthalmic care. French ophthalmologist Louis Emile Javal, began using ocular exercises to treat strabismus (squint) and described the practice of orthoptics in his writings in the late 19th century. Mary Maddox pioneered the orthoptic profession and was the first documented orthoptist. She was trained by her father, Ernest E. Maddox, in response to increasing patient demand and time needed to examine and treat patients.
Ernest Maddox was a reputed ophthalmologist as well as the inventor of various instruments for investigating binocular vision. Mary Maddox started her own practice in London in the early 1920s and her first hospital clinic opened at the Royal Westminster Hospital in 1928.
The first Australian hospital clinic with orthoptists was established at the Alfred Hospital in Melbourne in 1931.
Current orthoptic practice
Orthoptists are mainly involved with diagnosing and managing patients with binocular vision disorders which relate to
amblyopia
Amblyopia, also called lazy eye, is a disorder of sight in which the brain fails to fully process input from one eye and over time favors the other eye. It results in decreased vision in an eye that typically appears normal in other aspects. Amb ...
, eye movement disorders,
extraocular muscle
The extraocular muscles (extrinsic ocular muscles), are the seven extrinsic muscles of the human eye. Six of the extraocular muscles, the four recti muscles, and the superior and inferior oblique muscles, control movement of the eye and the o ...
balance such as with
version,
refractive errors,
vergence
A vergence is the simultaneous movement of both eyes in opposite directions to obtain or maintain single binocular vision.
When a creature with binocular vision looks at an object, the eyes must rotate around a vertical axis so that the projec ...
, accommodation imbalances,
positive relative accommodation and
negative relative accommodation. They work closely with ophthalmologists to ensure that patients with eye muscle disorders are offered a full range of treatment options. According to the
International Orthoptic Association, professional orthoptic practice involves the following:
*Primary activities
**Ocular motility diagnosis & co-management
**Vision screening. In the UK all school vision screening programmes for children between age 4–5 years is orthoptic led. Screening is either conducted by orthoptists or by health professionals who have received extensive training and certification from their local orthoptic department.
**Assessment of special needs
**Assessment and rehabilitation in neurological disorders
*Secondary activities
**Low Vision assessment and management
**
Glaucoma
Glaucoma is a group of eye diseases that result in damage to the optic nerve (or retina) and cause vision loss. The most common type is open-angle (wide angle, chronic simple) glaucoma, in which the drainage angle for fluid within the eye re ...
assessment & stable glaucoma management
**Biometry (includes
sonography
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles ...
work)
**Fundus photography and screening
**Visual electrodiagnosis
**
Retinoscopy and refraction, such as using a
phoropter to assess
refractive error
Refractive error, also known as refraction error, is a problem with focusing light accurately on the retina due to the shape of the eye and or cornea. The most common types of refractive error are near-sightedness, far-sightedness, astigmatism ...
s
*Further activities
**Specific outpatient waiting list initiatives to reduce the delay for children referred to the eye clinic (filter screening)
**Joint multidisciplinary children’s vision screening clinics (orthoptics/optometry)
**Organisation/prioritisation of the
strabismus
Strabismus is a vision disorder in which the eyes do not properly align with each other when looking at an object. The eye that is focused on an object can alternate. The condition may be present occasionally or constantly. If present during a ...
surgical admissions list according to agreed criteria
**Assistance with surgical procedures
Qualifications and training
In the US, students of orthoptics must attend two years of fellowship training. , there were thirteen programs affiliated with medical facilities or universities in the US and three in Canada offering an orthoptic curriculum.
In the United Kingdom, the orthoptic degree is a full time three-year course, including hospital placements to develop and refine clinical skills and specialism.
Admission criteria vary from school to school, however; national regulations require completion of a baccalaureate degree prior to sitting for the national certifying exams. A personal interview is customarily part of the admissions process. In the UK the majority of orthoptists are employed by the NHS in hospitals or community eye services. They contribute to the wider eye care teams, alongside ophthalmologists and optometrists.
See also
*
Bates method
The Bates method is an ineffective and potentially dangerous alternative therapy aimed at improving eyesight. Eye-care physician William Horatio Bates (1860–1931) held the erroneous belief that the extraocular muscles effected changes ...
*
Diplopia
Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. Also called double vision, it is a loss of visual focus under regular conditions, and is often ...
*
Dissociated vertical deviation
Dissociated vertical deviation (DVD) is an eye condition which occurs in association with a squint, typically infantile esotropia. The exact cause is unknown, although it is logical to assume it is from faulty innervation of eye muscles.
Presen ...
*
Esotropia
Esotropia is a form of strabismus in which one or both eyes turns inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a "cross-eyed" appearance. It is the opposite of exotropia and usua ...
*
Exotropia
Exotropia is a form of strabismus where the eyes are deviated outward. It is the opposite of esotropia and usually involves more severe axis deviation than exophoria. People with exotropia often experience crossed diplopia. Intermittent exotrop ...
*
Eye care professional
*
Eyepatch
An eyepatch is a small patch that is worn in front of one eye. It may be a cloth patch attached around the head by an elastic band or by a string, an adhesive bandage, or a plastic device which is clipped to a pair of glasses. It is often worn ...
*
Haploscope A haploscope is an optical device for presenting one image to one eye and another image to the other eye. The word derives from two Greek roots: ''haploieides'', single and ''skopeo'', to view. The word is often used interchangeably with stereoscop ...
*
Pediatric ophthalmology
*
Pinhole glasses
*
Vision therapy
Vision therapy (VT), or behavioral optometry, is an umbrella term for alternative medicine treatments using eye exercises, based around the pseudoscientific claim that vision problems are the true underlying cause of learning disabilities, parti ...
*
Vision rehabilitation Vision rehabilitation (often called vision rehab) is a term for a medical rehabilitation to improve vision or low vision. In other words, it is the process of restoring functional ability and improving quality of life and independence in an indivi ...
References
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Diagnostic ophthalmology