session 8: wednesday october 28, 2015: syndromes and associated eye conditions
TRANSCRIPT
GEPY 6911: Functional Implications of
Visual ImpairmentSession 8: Wednesday October 28, 2015:
Syndromes and Associated Eye Conditions
Questions from last week?
CVI Assignment
Final Project/Presentation
Syndromes and Associated Eye Conditions
Agenda
There are a number of syndromes with systemic manifestations that have ophthalmic implications
Patients with these syndromes are seen in ophthalmology clinics to asses and treat their ocular symptoms
Students with these syndromes may be referred to you!
Introduction
They can be classified according to the types of disorders they cause:◦ Chromosomal◦ Skeletal◦ Developmental◦ Connective Tissue◦ Hearing
They can also be classified according to how they cause their effect:◦ Physcial/Chemical injuries◦ Neural tube defects
Classification
Chromosomal Disorders
Trisomy 21Turner Syndrome
Etiology◦ Extra copy of chromosome 21◦ Most common single cause of human birth defects
Systemic Signs and Symptoms◦ Short stature◦ Developmental delay◦ Flattened facial appearance
Depressed nasal bridge◦ Congenital Heart defects◦ Prevalence of diseases such as leukemia,
hypothyroidism and diabetes mellitus
Trisomy 21 (Down Syndrome)
Ophthalmic Signs and Symptoms◦ Upward slant of palpebral fissures◦ Strabismus◦ Nystagmus◦ Keratoconus◦ Cataracts◦ Myopic refractive errors
Treatment◦ Require multi-systemic evaluations◦ Correcting refractive error, removing cataracts, etc.
Trisomy 21 (Down Syndrome)
Prognosis◦ Serious heart problems and higher risk of
leukemia may lead to early death◦ Adults with DS have an increased risk of dementia
◦ Generally they are living longer than ever!
Trisomy 21 (Down Syndrome)
Etiology◦ Absence of a set of genes on the X chromosome of
affected females
Systemic Signs and Symptoms◦ Short stature◦ Prone to osteoporosis and renal problems◦ Webbed, wide neck and low hairline◦ Scoliosis◦ Hypertension◦ Hyperthyroidism◦ Infertility◦ Swollen hands and feet
Turner Syndrome
Ophthalmic Signs and Symptoms◦ Ptosis◦ Strabismus◦ Amblyopia◦ Cataracts◦ Red-green color blindness◦ Dry eyes
Treatment◦ Monitoring of heart defects◦ Calcium and Vit. D to prevent osteoporosis◦ Cataract surgery ◦ Treatments for dry eyes
Turner Syndrome
Prognosis◦ Can have a normal life ◦ Require careful monitoring by a doctor
Turner Syndrome
Skeletal DisordersCrouzon/Apert SyndromeTreacher-Collins SyndromeGoldenhar SyndromePierre-Robin SyndromeMarfan SyndromeStickler SyndromeCockayne Syndrome
Etiology◦ Caused by premature fusion of the cranial sutures
causing a skull deformity◦ Sporadic mutations◦ Autosomal dominant
Systemic Signs and Symptoms◦ Cranium is egg-shaped ◦ Crowding of the teeth◦ Syndactyly of the fingers and toes (Apert)◦ Heart and Kidney malformations (Apert)◦ Short stature◦ Hearing impairments
Crouzon/Apert Syndrome
Ophthalmic Signs and Symptoms◦ Proptosis (caused by abnormal orbital structure)◦ Optic nerve compression◦ Strabismus◦ Hyperopic refractive errors◦ Iris colobomas◦ Nystagmus◦ Ptosis◦ Retinal detachments◦ Congenital cataracts
Crouzon/Apert Syndrome
Treatment◦ No treatments exist
Cosmetic surgeries
Prognosis◦ Generally good◦ Can sometimes have high intracranial pressure
which can cause death
Crouzon/Apert Syndrome
Etiology◦ Caused by a defective protein◦ Is hereditary◦ Possible mutation on chromosome 5
Systemic Signs and Symptoms◦ Small chin◦ Steep angle of the lower jaw (breathing problems)◦ Prominent nose◦ Underdeveloped ears◦ Hearing loss ◦ Heart defects
Treacher-Collins Syndrome
Ophthalmic Signs and Symptoms◦ Strabismus◦ Downward slant of the eyes◦ Absence of lashes on the lower lid margin◦ Sometimes coloboma
Treatments◦ Genetic counselling◦ Monitoring heart defects◦ Cosmetic surgery
Treacher-Collins Syndrome
Prognosis◦ Normal intelligence and life span◦ Must be followed for any systemic complications
Treacher-Collins Syndrome
Etiology◦ Unknown◦ Sporadic occurrence, AD and AR inheritance
Systemic Signs and Symptoms◦ Facial asymmetry due to abnormal development of
the underlying facial bones◦ Growths of skin and cartilage around the ear◦ Hearing loss is common◦ Cleft lip/palate◦ Malformations of the spine and skull◦ Sometimes developmental delay
Goldenhar Syndrome
Ophthalmic Signs and Symptoms◦ Overgrowth of normal tissues on the outer coats
of the eye◦ Dermoids◦ Upper lid colobomas◦ Ptosis◦ Narrowing of the palpebral fissures◦ Lacrimal system problems◦ Retinal and optic nerve problems◦ Strabisums
Goldenhar Syndrome
Treatment◦ Surgery can be done on the bones of the face◦ Repair of ptosis, strabismus surgery, removal of
larger dermoids
Prognosis◦ Dependent on associated complications
Goldenhar Syndrome
Etiology◦ Unknown◦ AR inheritance
Systemic Signs and Symptoms◦ Cardiovascular problems◦ Hyperextendible joints◦ Small mandible◦ Foot and hip abnormalities◦ Scoliosis◦ CNS problems (50% of cases)
Language delay, epilepsy and hydrocephalus
Pierre-Robin Syndrome
Ophthalmic Signs and Symptoms◦ Congential glaucoma◦ High myopia◦ Retinal detachment◦ Congenital cataracts◦ Microphthalmos◦ Esotropia
Pierre-Robin Syndrome
Treatment◦ Treatment of systemic complications
Respiratory/feeding problems Airway obstruction
◦ Treatment of glaucoma, cataracts, strabismus as needed
Prognosis◦ Depends on complications◦ Mortality rates of up to 30% due to airway
obstruction and feeding difficulties
Pierre-Robin Syndrome
Etiology◦ AD disorder◦ Mutation on chromosome 15
Systemic signs and symptoms◦ Long fingers and toes◦ Taller for age◦ Dislocations of hips and mandible◦ Cardiovascular defects
Marfan Syndrome
Ophthalmic Signs and Symptoms◦ Lens dislocation◦ Large, flat corneas◦ Myopia◦ Cataract◦ Miosis◦ Glaucoma◦ Retinal detachment◦ Ptosis◦ Strabismus◦ Incomplete choroidal formation
Marfan Syndrome
Treatment◦ Treatment of systemic complications
Hormone therapy Heart surgery
◦ Correction of refractive errors and treatment of associated eye findings
Prognosis◦ Depends on severity of cardiovascular problems
Marfan Syndrome
Etiology◦ AD inheritance◦ Mutation on chromosome 12
Systemic Signs and Symptoms◦ Flattened face◦ Depressed nasal bridge◦ Short nose◦ Deafness◦ Dental abnormalities◦ Cleft palate◦ Scoliosis◦ Short sature◦ Arthritis
Stickler Syndrome
Ophthalmic Signs and Symptoms◦ Myopia (8-18 diopters)◦ Retinal detachments◦ 75% can develop myopia before 20 years of age◦ Cataracts◦ Less frequently
Lens dislocation Glaucoma
Stickler Syndrome
Treatment◦ Hip replacement◦ Hearing aids◦ Correction of myopia◦ Retinal detachment surgery
Treatment◦ Good prognosis◦ Vision loss is most severe complication◦ Arthritis can decrease quality of life in older
patients
Stickler Syndrome
Etiology◦ Defect in a DNA repair mechanism◦ AR inheritance
Systemic Signs and Symptoms◦ Progressive degeneration of CNS and PNS◦ Dwarfism apparent by one year of age◦ Microcephaly ◦ Developmental delay◦ Hearing loss◦ Thin, dry hair◦ Narrow nose◦ Sunken eyes◦ Dental abnormalities◦ Photosensitive skin
Cockayne Syndrome
Ophthalmic Signs and Symptoms◦ Salt-and-pepper retinal pigmentation◦ Optic atrophy◦ Corneal opacity◦ Cataracts◦ Hyperopia◦ Strabismus◦ Nystagmus◦ Decreased lacrimation◦ Photophobia
Cockayne Syndrome
Treatment◦ Specific to specific complications
See audiologist for hearing problems Ophthalmologist for eye problems Dentists for dental abnormalities
Prognosis◦ Not good◦ Death usually occurs in adolescence or early
adulthood
Cockayne Syndrome
Developmental Disorders
Bardet-BiedlPrader-Willi SyndromeSepto-Optic DysplasiaCHARGE SyndromeAlstrom
Etiology◦ Unknown◦ AR inheritance
Systemic Signs and Symptoms◦ Obesity◦ Developmental delay◦ Kidney abnormalities◦ Can sometimes have extra fingers/toes or fusion of
fingers/toes◦ Speech difficulties◦ Diabetes mellitus
Bardet-Biedl
Ophthalmic Signs and Symptoms◦ RP or progressive pigmentary retinal degeneration
or rod-cone dystrophy◦ Nystagmus sometimes present
Treatment◦ No specific treatments◦ Manage vision loss◦ Obesity is resistant to treatment
Bardet-Biedl
Etiology◦ Missing gene on chromosome 15◦ Missing genetic material on the father’s part of the chromosome
Systemic Signs and Symptoms◦ Feeding difficulties in infants resulting in low weight until 6
months of age◦ Obesity occurs around age 2◦ Extreme insatiable appetite ◦ Heart problems◦ Diabetes mellitus◦ Developmental delay◦ Short stature◦ Small hands and feet◦ Cutaneous hypopigmentation
Prader-Willi Syndrome
Ophthalmic Signs and Symptoms◦ Non-accommodative or infantile-type strabismus◦ Most have blue irides◦ Iris transillumination defects◦ Nystagmus (esp. on lateral gaze)◦ Myopia in ¼ of cases◦ RPE hypopigmentation◦ Foveal hypoplasia
Treatment◦ Must be followed by multiple specialists◦ Monitor their diet and be physically active
Prader-Willi Syndrome
Prognosis◦ Generally good◦ Normal life span◦ Complications, like obesity can shorten life
expectancy and quality of life
Prader-Willi Syndrome
Etiology◦ Defect of normal embryological development◦ Has been linked to young maternal age and in-utero
cocaine exposure◦ Rare familiar occurance
Systemic Signs and Symptoms◦ Pituitary deficiency (variable degrees)◦ Sometimes seizures◦ Low muscle tone◦ Jaundice at birth◦ Developmental delay
Septo-Optic Dysplasia/de Morsier Syndrome
Ophthalmic Signs and Symptoms◦ Optic nerve hypoplasia◦ Nystagmus◦ Strabismus◦ Variable degrees of visual impairment
Treatment◦ Hormone replacement therapy for hormone deficiencies◦ No treatment for ophthalmic symptoms
Prognosis Dependent on the presence and severity of symptoms
Septo-Optic Dysplasia/de Morsier Syndrome
Etiology◦ AD genetic disorder
Systemic Signs and Symptoms◦ Choanal atresia – back of the nasal sinuses on one or both
sides is narrowed or doesn’t connect with the back of the throat
◦ Cranial nerve abnormality – difficulty swallowing, facial paralysis
◦ Heart defect◦ Growth retardation◦ Developmental delay◦ Underdeveloped genitals◦ Ear abnormalities
CHARGE Syndrome
Ophthalmic Signs and Symptoms◦ Coloboma◦ Micorophthalmos or anophthalmos
Treatment◦ Treatment of many medical and physical problems
Prognosis◦ Can have many life-threatening issues◦ With advances in medical care, these children can
survive and become healthy individuals
CHARGE
CHARGE
CHARGE
Etiology◦ Caused by a defective gene, but it’s unknown how this gene
causes the disorder◦ AR inheritance
Systemic Signs and Symptoms◦ Dark patches of skin◦ Deafness◦ Impaired heart function◦ Obesity◦ Progressive kidney failure◦ Slowed growth◦ Symptoms of type II diabetes◦ Hypothyroidism◦ Developmental delay
Alstrom
Ophthalmic Signs and Symptoms◦ Cone-rod dystrophy◦ Light sensitivity
Treatment◦ No specific treatment◦ Treatment for different symptoms
Diabetes medication Hearing aids Heart medication Thyroid hormone replacement
◦ Prognosis Good Dependent on associated symptoms
Alstom
Connective Tissue Disorders
Ehlers-Danlos Syndrome
Etiology◦ Genetic defect in collagen and connective tissue synthesis and
structure◦ Can be AR, AD or X-linked recessive
Systemic Signs and Symptoms◦ Stretchable skin◦ Underlying vessels are diseased and visible through the skin◦ Fragile skin◦ Poor wound healing◦ Increased joint flexibility ◦ Scoliosis◦ Respiratory defects◦ Cardiac problems◦ Low weight◦ Short stature
Ehlers-Danlos Syndrome
Ophthalmic Signs and Symptoms◦ Found in Type VI ED Syndrome◦ Retinal detachment◦ Retinal hemorrhage ◦ Glaucoma◦ Abnormal coloration of the sclera◦ In rare cases the globe can rupture◦ Myopia◦ Keratoconus
Ehlers-Danlos Syndrome
Treatment◦ No specific treatment exists◦ Consult ophthalmologist and genetic counsellor◦ Refrain from heavy lifting, contact sports or
anything that puts stress on joints
Prognosis◦ Normal ◦ In Type IV, life expectancy is to about 50 years of
age
Ehlers-Danlos Syndrome
Physical/Chemical Injury
Fetal Alcohol Syndrome
Etiology◦ Women who drink heavily during their pregnancy
will produce a child with the features of FAS
Fetal Alcohol Syndrome
Systemic Signs and Symptoms◦ Craniofacial abnormalities
Mid-face hypoplasia Low nasal bridge Thin upper lip Cleft palate Flat philtrum
◦ CNS and neurobehavioral anomalies Microcephaly Developmental delay Siezures ADHD
◦ Cardiovascular disorders◦ Hearing loss
Fetal Alcohol Syndrome
Ophthalmic Signs and Symptoms◦ Short palpebral fissure◦ Monocular or asymmetric ptosis◦ Myopia is common◦ Strabismus (usually ET)◦ Optic nerve hypoplasia
Treatment◦ Treatment of associated birth defects ◦ Medications to treat ADHD
Fetal Alcohol Syndrome
Prognosis◦ Normal life span◦ Quality of life can be impaired
Mental health problems later in life Drug and alcohol addictions later in life
Fetal Alcohol Syndrome
Neural Tube DefectsSpina Bifida
Etiology◦ Occurs when a growing fetus is not exposed to
enough folic acid between the 17th and 30th day of gestation.
◦ The neural tube does not close completely or at all, which causes an incomplete closure of the spinal column
Spina Bifida
Systemic Signs and Symptoms◦ Hydrocephalus◦ Spinal cord is not protected by the spinal column
causing the spinal cord to grow into a growth in the back
◦ Partial paralysis◦ Bladder/bowel control problems◦ Learning disabilities
Spina Bifida
Ophthalmic Signs and Symptoms◦ Microphthalmus or anophthalmos◦ Choriodial coloboma◦ Atrophy of retinal ganglion cells and macula◦ Optic atrophy◦ Strabismus
Treatments◦ Can be treated in-utero if detected early enough◦ Shunts for hydrocephalus◦ Continuous follow-up from a variety of specialists
Spina Bifida
Prognosis◦ Longer life span now with advances in treatment◦ Shunting of hydrocephalus can lead to near-
normal intelligence
Spina Bifida
Hearing DisordersUsher Syndrome
Etiology◦ Unknown◦ AR inheritance
Systemic Signs and Symptoms◦ Sensorineural hearing loss
Progressive◦ Developmental delay◦ Cerebral atrophy
Usher Syndrome
Ophthalmic Signs and Symptoms◦ Night blindness
Peaks at 5 years and again between 15-20 years◦ Retinitis Pigmentosa◦ Progressive vision loss ◦ VF become constricted◦ Bull’s-eye maculopathy◦ Cataract◦ Vitreous detachment
Usher Syndrome
Treatment◦ No cure◦ Treatment of different complications◦ Early detection is important
Prognosis◦ Visual and auditory prognosis will vary depending
on severity◦ No reports on changes in lifespan
Usher Syndrome
There are a number of Syndromes that have associated eye conditions
Think about all of the different functional implications you’ve learned and how they would apply to each case
Conclusion
Happy Halloween!!!Next class: Optics and Low Vision Devices
Quiz for tonight’s lecture is due by November 8, 2015