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The following text is a summary of Optical Diagnostics' aniseikonia information webpage. The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ...
The International Statistical Classification of Diseases and Related Health Problems 10th Revision (ICD-10) is a coding of diseases and signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or diseases, as classified by the World Health Organization (WHO). ...
// H00-H59 - Diseases of the eye and adnexa (H00-H06) Disorders of eyelid, lacrimal system and orbit (H00) Hordeolum and chalazion (H000) Hordeolum and other deep inflammation of eyelid (H001) Chalazion (H01) Other inflammation of eyelid (H010) Blepharitis (H011) Noninfectious dermatoses of eyelid (H02) Other disorders of eyelid (H020) Entropion...
The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ...
The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ...
The Disease Bold textDatabase is a free website that provides information about the relationships between medical conditions, symptoms, and medications. ...
Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ...
Aniseikonia is a binocular condition in which the two eyes perceive images of different size. These unequal images can be caused by a difference in: - optical magnification (i.e. different retinal image sizes)
- retinal receptor distribution (i.e. a different sampling of the retinal images)
- cortical processing (i.e. different processing of the sampled retinal images)
Patients at risk of aniseikonia Aniseikonia is often associated with unequal refractive errors between the eyes (anisometropia). However, there are several other patient groups at risk. For example, research has shown that appr. 40% of the patients that underwent cataract surgery/surgeries and who had an intra-ocular lens(es) implanted, have complaints referable to aniseikonia. This also makes one wonder how much aniseikonia is induced with refractive surgery such as LASIK. Another group of patients at risk are patients who have a retinal condition or who underwent retinal surgery. For example with an epiretinal membrane (macular pucker) or after a retinal detachment surgery. The aniseikonia in these patients may be complicated because the aniseikonia is field-dependent (variable over the retina), but fortunately also these patients often can get more comfortable binocular vision by optically correcting the aniseikonia. Human eye cross-sectional view, showing position of human lens. ...
Refractive eye surgery is any eye surgery used to improve the refractive state of the eye and decrease dependency on glasses or contact lenses. ...
Human eye cross-sectional view. ...
Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue. ...
Symptoms Most aniseikonic symptoms are quite general (a-specific), for example: headaches, asthenopia (ocular fatigue, burning, tearing, pain, pulling, etc.), light sensitivity, reading difficulty, nausea, and double images (diplopia). This is one of the reasons why aniseikonia is sometimes overseen by the treating eye care provider. Only, if the aniseikonia is severe, the patient could also actually see an image size difference by closing one eye at a time. However, symptoms usually occur already with much less aniseikonia. Diplopia, commonly known as double vision, is the perception of two images from a single object. ...
Clinically significant aniseikonia values Aniseikonia of 3% or more is generally considered clinically significant, but sensitive individuals may have symptoms with less aniseikonia. Testing for aniseikonia Testing for aniseikonia is important. In older books sometimes rules of thumb are given based on retinal images size differences alone. However, research has shown that even in anisometropia the retinal receptor distribution may be different between the eyes, making aniseikonia management based on calculated retinal image sizes inaccurate. Testing for aniseikonia can be done using a space eikonometric method (based on space distortions accompanying the aniseikonia) or a direct comparison method. The space eikonometric method is sometimes still used in research, but it is less suited for clinical purposes (and commercially unavailable). There are two commercially available aniseikonia tests: the Aniseikonia Inspector (2003-2007) and the 'New' Aniseikonia Test (NAT, 1982). The Aniseikonia Inspector is designed according to the latest research and can, for example, also test retinally-induced aniseikonia. Furthermore, the Aniseikonia Inspector is unique in that it contains a module to calculate aniseikonia correcting prescriptions. Correcting aniseikonia Aniseikonia can be corrected by changing the optical magnification properties of the auxilary optics (glasses, contact lenses). For example, if the curvature or thickness of a spectacle lens is changed (without changing its refractive power, so there will still be a good visual acuity), the optical magnification will change. Also, the distance between the spectacle lens and the eye (vertex distance) affects the optical magnification. Therefore, contact lenses will in general give a different aniseikonia than glasses. It might even be possible to correct aniseikonia by fitting a contact lens together with a spectacle lens, creating a weak telescope system. What solution is best depends on the amount of aniseikonia, type of aniseikonia (optical-induced or retinally-induced), the refraction, and the importance of cosmetics. Optical power or dioptric power or refractive power is the degree to which a lens or mirror converges or diverges light. ...
Traditional Snellen chart used for visual acuity testing. ...
For more information on aniseikonia and possible correction options, see Optical Diagnostics' aniseikonia information webpage. | Pathology of the eye (primarily H00-H59, 360-379) | | Eyelid, lacrimal system and orbit | Stye - Chalazion - Blepharitis - Entropion - Ectropion - Lagophthalmos - Blepharochalasis - Ptosis - Xanthelasma - Trichiasis - Dacryoadenitis - Epiphora - Exophthalmos - Enophthalmos | | Conjunctiva | Conjunctivitis - Pterygium - Pinguecula - Subconjunctival hemorrhage | | Sclera and cornea | Scleritis - Keratitis - Corneal ulcer - Snow blindness - Thygeson's superficial punctate keratopathy - Fuchs' dystrophy - Keratoconus - Keratoconjunctivitis sicca - Arc eye - Keratoconjunctivitis - Corneal neovascularization - Kayser-Fleischer ring - Arcus senilis - Band keratopathy | | Iris and ciliary body | Iritis - Uveitis - Iridocyclitis - Hyphema - Persistent pupillary membrane - Iridodialysis - Synechia | | Lens | Cataract - Aphakia | | Choroid and retina | Chorioretinitis - Choroideremia - Retinal detachment - Retinoschisis - Retinopathy (Hypertensive retinopathy, Diabetic retinopathy, Retinopathy of prematurity) - Macular degeneration - Retinitis pigmentosa - Retinal haemorrhage - Central serous retinopathy - Macular edema - Epiretinal membrane - Macular pucker | | Optic nerve and visual pathways | Optic neuritis - Papilledema - Optic atrophy - Leber's hereditary optic neuropathy | Ocular muscles, binocular movement, accommodation and refraction | Paralytic strabismus: Ophthalmoparesis - Progressive external ophthalmoplegia - Palsy (III, IV, VI) - Kearns-Sayre syndrome Other strabismus: Esotropia/Exotropia - Hypertropia - Heterophoria (Esophoria, Exophoria) - Brown's syndrome - Duane syndrome Other binocular: Conjugate gaze palsy - Convergence insufficiency - Internuclear ophthalmoplegia - One and a half syndrome A renal cell carcinoma (chromophobe type) viewed on a hematoxylin & eosin stained slide Pathologist redirects here. ...
For other uses, see Eye (disambiguation). ...
An eyelid is a thin fold of skin and muscle that covers and protects an eye. ...
Tears are a liquid produced by the bodys process of lacrimation to clean and lubricate the eyes. ...
In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. ...
A stye or hordeolum is an infection of the sebaceous glands at the base of the eyelashes[1]. While they produce no lasting damage, they can be quite painful. ...
A chalazion, also known as a Meibomian gland lipogranuloma, is a cyst in the eyelid that is caused by inflammation of the meibomian gland, usually on the upper eyelid. ...
Blepharitis is inflammation of the eyelids. ...
Entropion is a medical condition in which the eyelids fold inward. ...
Ectropion is a condition of loose eyelids. ...
Lagophthalmos describes difficulty in complete closure of the eyelid over the eyeball. ...
Blepharochalasis is an inflammation of the eyelid that is characterized by exacerbations and remissions of eyelid edema, which results in a stretching and subsequent atrophy of the eyelid tissue. ...
In ophthalmology, ptosis is an abnormally low position (drooping) of the upper eyelid which may grow more or less severe during the day. ...
Xanthelasma (or xanthelasma palpebrarum) are sharply demarcated yellowish collections of cholesterol underneath the skin, usually around the eyes. ...
Trichiasis is a medical term for ingrown eyelashes. ...
Dacryoadenitis is inflammation of the lacrimal glands (the tear-producing glands). ...
Epiphora is excessive tear production, usually a result from an irritation of the eye. ...
Exophthalmos (or proptosis) is a bulging of the eye anteriorly out of the orbit. ...
Enophthalmos is recession of the eyeball within the orbit. ...
The conjunctiva is a membrane that covers the sclera (white part of the eye) and lines the inside of the eyelids. ...
Pterygium usually refers to a benign growth of the conjunctiva. ...
A Pinguecula is a type of conjunctival degeneration in the eye. ...
A subconjunctival hemorrhage is a common and relatively minor post-LASIK complication. ...
Schematic diagram of the human eye. ...
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber, providing most of an eyes optical power [1]. Together with the lens, the cornea refracts light and, as a result, helps the eye to focus. ...
Scleritis is a serious inflammatory disease that affects the white outer coating of the eye, known as the sclera. ...
A corneal ulcer is an inflammatory condition of the cornea involving loss of its outer layer. ...
For other meanings see Snowblind. ...
Thygesons superficial punctate keratopathy (TSPK) is a disease of the eyes. ...
Fuchs dystrophy is a slowly progressing corneal disease that usually affects both eyes and is slightly more common in women than in men. ...
Keratoconus (from Greek: kerato- horn, cornea; and konos cone), is a degenerative non-inflammatory disorder of the eye in which structural changes within the cornea cause it to thin and change to a more conical shape than its normal gradual curve. ...
Keratoconjunctivitis sicca (KCS), also called keratitis sicca,[1] sicca syndrome,[1] xerophthalmia,[1] dry eye syndrome (DES),[1] or simply dry eyes,[1] is an eye disease caused by decreased tear production or increased tear film evaporation commonly found in humans and some animals[2]. Keratoconjunctivitis sicca is Latin and...
Arc eye, also known as arc flash, welders flash, corneal flash burns, or flash burns, is a painful ocular condition sometimes experienced by welders who have failed to use adequate eye protection. ...
Keratoconjunctivitis sicca or KCS is an eye disease caused by decreased tear production or increased tear film evaporation commonly found in people and small animals. ...
Corneal neovascularization is the excessive ingrowth of blood vessels from the limbal vascular plexus into the cornea. ...
Kayser-Fleischer rings are pigmented rings in the peripheral cornea, resulting from copper deposition in Descemets membrane. ...
Arcus senilis (or Arcus senilis corneae. ...
Band keratopathy is a corneal disease derived from the appearance of calcium on the central cornea. ...
In anatomy, the iris (plural irises or irides) is the most visible part of the eye of vertebrates, including humans. ...
Schematic diagram of the human eye The ciliary body is the part of the eye containing the ciliary muscle and ciliary processes. ...
Iritis is a form of anterior uveitis and refers to the inflammation of the iris of the eye. ...
Uveitis specifically refers to inflammation of the middle layer of the eye, termed the uvea but in common usage may refer to any inflammatory process involving the interior of the eye. ...
Iridocyclitis, also known as anterior uveitis, is a condition in which the uvea of the eye suffers inflammation. ...
Caused by a blunt blow to the eye. ...
Persistent pupillary membrane (PPM) is a condition of the eye involving remnants of a fetal membrane that persist as strands of tissue crossing the pupil. ...
Iridodialysis, sometimes known as a coredialysis, is a localized separation or tearing away of the iris from its attachment to the ciliary body. ...
A synechia is an eye condition where the iris adheres to the either the cornea (i. ...
Light from a single point of a distant object and light from a single point of a near object being brought to a focus by changing the curvature of the lens. ...
Human eye cross-sectional view, showing position of human lens. ...
Aphakia is the absence of the lens of the eye, due to surgical removal, perforating wound or ulcer, or congenital anomaly; causes a loss of accommodation, hyperopia, and a deep anterior chamber. ...
The choroid, also known as the choroidea or choroid coat, is the vascular layer of the eye lying between the retina and the sclera. ...
Human eye cross-sectional view. ...
In medicine, Chorioretinitis is an inflammation of the choroid and retina of the eye. ...
Choroideremia is an X-linked recessive retinal degenerative disease that leads to the degeneration of the choriocapillaris, the retinal pigment epithelium, and the photoreceptor of the eye. ...
Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue. ...
Retinoschisis is an uncommon eye disease characterized by the abnormal splitting of the retinas sensory layers, usually in the outer plexiform layer, with resulting loss of visual function [1]. The retina, which consists of multiple layers of interconnected nerve and pigment cells, separates into separate layers resulting in a...
Retinopathy is a general term that refers to some form of non-inflammatory damage to the retina of the eye. ...
Hypertension, or high blood pressure that does not respond to treatment, has several ocular manifestations. ...
Diabetic retinopathy is retinopathy (damage to the retina) caused by complications of diabetes mellitus, which could eventually lead to blindness. ...
Retinopathy of prematurity (ROP), previously known as retrolental fibroplasia (RLF), is a disease of the eye that affects prematurely born babies. ...
Listen to this article ( info/dl) This audio file was created from an article revision dated 2005-07-19, and may not reflect subsequent edits to the article. ...
Normal vision. ...
Retinal haemorrhage is a disorder of the eye in which bleeding occurs into the retina. ...
Central serous retinopathy or CSR is a visual impairment, often temporary, usually in one eye, affecting males in the age group 20 to 50. ...
Macular edema occurs when fluid and protein deposits collect on or under the macula, causing it to thicken and swell. ...
Human eye cross-sectional view. ...
Human eye cross-sectional view. ...
This article is about the anatomical structure. ...
The visual system is the part of the nervous system which allows organisms to see. ...
Optic neuritis, sometimes called retrobulbar neuritis, is the inflammation of the optic nerve that may cause a complete or partial loss of vision. ...
Papilledema is optic disc swelling that is caused by increased intracranial pressure. ...
Optic atrophy is a pathological term and somewhat misleading. ...
Leberâs hereditary optic neuropathy (LHON) or Leber optic atrophy is a mitochondrially inherited (mother to all offspring) form of acute or subacute loss of central vision that may lead to degeneration of retinal ganglion cells (RGCs) and their axons; this affects predominantly young adult males. ...
MRI scan showing lateral and medial rectus muscles. ...
Binocular vision is vision in which both eyes are used together. ...
Light from a single point of a distant object and light from a single point of a near object being brought to a focus by changing the curvature of the lens. ...
For the property of metals, see refraction (metallurgy). ...
Ophthalmoparesis is a physical finding in certain neurologic illnesses. ...
Progressive external ophthalmoplegia is a disorder of the mitochondria. ...
Damage to the oculomotor nerve, termed oculomotor nerve palsy is known by the down n out symptoms. ...
Fourth nerve palsy is a condition present at birth characterized by a vertical misalignment of the eyes due to a weakness or paralysis of the superior oblique muscle. ...
Sixth nerve palsy, or abducens nerve palsy, is a disorder associated with dysfunction of cranial nerve VI (the abducens nerve) which is responsible for contracting the lateral rectus muscle to abduct (i. ...
Kearns-Sayre syndrome (abbreviated KSS) is a disease caused by a 5,000 base deletion in the mitochondrial DNA. As such, it is a rare genetic disease in that it can be heteroplasmic, that is, more than one genome can be in a cell at any given time. ...
Strabismus (from Greek: ÏÏÏαβιÏμÏÏ strabismos, from ÏÏÏαβίζειν strabizein to squint, from ÏÏÏαβÏÏ strabos squinting, squint-eyed[1]) is a condition in which the eyes are not properly aligned with each other. ...
Person exhibiting esotropia of the right eye Esotropia is a form of strabismus where one or both of the eyes turn inward. ...
Person exhibiting exotropia of the right eye Exotropia is a form of strabismus where the eyes are deviated outward. ...
Hypertropia is a condition of misalignment of the eyes (strabismus), whereby the visual axis of one eye is higher than the fellow fixating eye. ...
Heterophoria is a type of eye condition where the motion of the eyes is not parallel to each other. ...
Esophoria is characterised by inward deviation of the eye usually due to extra-ocular muscle imbalance. ...
This article or section does not cite any references or sources. ...
Browns syndrome is due to fibrous adhesions in the upper medial quadrant of the orbit. ...
An individual diagnosed with Duane syndrome in the left eye. ...
Conjugate gaze palsy refers to an inability of both eyes to move in the same direction at the same time. ...
Convergence insufficiency is a sensory and neuromuscular anomaly of the binocular vision system, characterized by an inability to converge the eyes or sustain convergence. ...
Internuclear ophthalmoplegia is a physical finding, or sign, that is a particular form of [[[ophthalmoparesis]]. It can affect either the right or left eye. ...
Schematic representation of most common extra-ocular movement abnormality in one and a half syndrome. ...
Refractive error: Hyperopia/Myopia - Astigmatism - Anisometropia/Aniseikonia - Presbyopia | | Visual disturbances and blindness | Amblyopia - Leber's congenital amaurosis - Subjective (Asthenopia, Hemeralopia, Photophobia, Scintillating scotoma) - Diplopia - Scotoma - Anopsia (Binasal hemianopsia, Bitemporal hemianopsia, Homonymous hemianopsia, Quadrantanopia) - Color blindness (Achromatopsia) - Nyctalopia - Blindness/Low vision | | Pupil | Anisocoria - Argyll Robertson pupil - Marcus Gunn pupil/Marcus Gunn phenomenon - Adie syndrome | | Infectious diseases | Trachoma - Onchocerciasis | | Other | Nystagmus - Miosis - Mydriasis - Glaucoma - Floater - Leber's hereditary optic neuropathy - Red eye - Keratomycosis - Xerophthalmia - Aniridia | |