More than one million Brits could be using the road without letting the DVLA know about a pre-existing medical condition, reports claim.

The common misconception that drivers with just poor eyesight should make this known to the DVLA is wrong, in fact the list is drastically longer. There are nearly 200 conditions including one-off incidents which could impact a driver's ability in the future, which must be declared.

The DVLA also insists drivers must get in touch if they develop a condition or disability, or if an already declared condition worsens. A full list of medical conditions has been shared on the website and includes illnesses like diabetes, sleep apnoea, or strokes, as well as glaucoma.

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Drivers are warned that they must now disclose any of the listed conditions to the DVLA immediately or face severe penalties. can choose to declare these conditions either online or using a paper form and await a letter with a decision from the DVLA over whether or not they can continue to drive.

In some instances, the organisation will get in touch with your GP or even arrange for a medical assessment to be made before coming to a conclusion. The decision isn't a simple yes or no - the DVLA may shorten the length of time before a person needs to renew, order speed limits to be fitted in a vehicle, apply for a new licence or surrender the current one immediately.

If a driver has been told to give up driving they can appeal the decision. But if they choose not to disclose a condition and become involved in an accident, they may face charges. The DVLA, if it becomes aware, could also revoke a licence and reject any applications to get it back in future.

Drivers must give their licence back to the DVLA if a motorist has been told by a doctor to stop driving for three months or more, and if the medical condition affects an individual's ability to drive safely for three months or more.

Drivers who do not meet the required standard for driving due to their illness or disease will also need to stop indefinitely, unless an application is made to reinstate the licence and it is accepted by the DVLA.

• Absence seizures
• Acoustic neuroma
• Addison’s disease
• Agoraphobia
• Alcohol problems
• Alzheimer’s disease
• Amaurosis fugax
• Amputations
• Amyotrophic Lateral Sclerosis (ALS)
• Angina
• Angioplasty
• Ankylosing spondylitis
• Anorexia nervosa
• Anxiety
• Aortic aneurysm
• Arachnoid cyst
• Arrhythmia
• Atrial defibrillator
• Arteriovenous malformation
• Arthritis
• Asperger syndrome
• Ataxia
• Attention deficit hyperactivity disorder (ADHD)
• Autistic spectrum condition
• Balloon angioplasty (leg)
• Bipolar disorder
• Blackouts
• Blepharospasm
• Blood clots
• Blood pressure
• Brachial plexus injury
• Brain abscess, cyst or encephalitis
• Brain aneurysm
• Brain angioma
• Brain haemorrhage
• Brain injury (traumatic)
• Brain tumours
• Broken limbs
• Brugada syndrome
• Burr hole surgery
• Caesarean section
• Cancer
• Cataracts
• Catheter ablation
• Cardiac problems
• Carotid artery stenosis
• Cataplexy
• Cavernoma
• Central venous thrombosis
• Cerebral palsy
• Charcot-Marie-Tooth disease
• Chiari malformation
• Chronic aortic dissection
• Cognitive problems
• Congenital heart disease
• Convulsions
• Coronary artery bypass or disease
• Coronary angioplasty
• Cranial nerve palsy (with double vision
• Cystic fibrosis
• Deafness
• Defibrillator
• Déjà vu
• Dementia
• Depression
• Diabetes
• Dilated cardiomyopathy
• Diplopia (double vision)
• Dizziness
• Drug misuse
• Eating disorders
• Empyema (brain)
• Epilepsy
• Essential tremor
• Eye conditions
• Fainting
• Fits
• Fractured skull
• Friedreich’s ataxia
• Glaucoma
• Global amnesia
• Grand mal seizures
• Guillain-Barré syndrome
• Head injury
• Heart attack
• Heart arrhythmia
• Heart failure
• Heart murmurs
• Heart palpitations
• Heart valve disease or replacement valve
• High blood pressure
• HIV or AIDS
• Hodgkin’s lymphoma
• Huntington’s disease
• Hydrocephalus
• Hypertension
• Hypertrophic cardiomyopathy
• Hypoglycaemia
• Hypoxic brain damage
• Hysterectomy
• Implantable cardioverter defibrillator (ICD)
• Intracerebral haemorrhage
• Ischaemic heart disease
• Kidney dialysis
• Kidney problems
• Korsakoff’s syndrome
• Labyrinthitis
• Learning difficulties
• Left bundle branch block
• Leukaemia
• Lewy body dementia
• Limb disability
• Long QT syndrome
• Loss of an eye
• Low blood sugar
• Lumboperitoneal shunt
• Lung cancer
• Lymphoma
• Macular degeneration
• Malignant brain tumours
• Malignant melanoma
• Manic depressive psychosis
• Marfan’s syndrome
• Medulloblastoma
• Memory problems (severe)
• Meningioma
• Mini-stroke
• Monocular vision (sight in one eye only)
• Motor neurone disease
• Multiple sclerosis
• Muscular dystrophy
• Myasthenia gravis
• Myocardial infarction
• Myoclonus
• Narcolepsy
• Night blindness
• Obsessive compulsive disorder
• Obstructive sleep apnoea
• Ocular myasthenia gravis (with double vision)
• Ophthalmoplegia (with double vision)
• Pacemakers
• Palpitations
• Paranoia
• Paranoid schizophrenia
• Paraplegia
• Parkinson’s disease
• Peripheral arterial disease
• Peripheral neuropathy
• Personality disorder
• Petit mal seizures
• Pituitary tumour
• Post traumatic stress disorder (PTSD)
• Psychosis
• Psychotic depression
• Pulmonary arterial hypertension
• Renal dialysis
• Retinal artery fugax
• Retinitis pigmentosa
• Retinopathy (with laser treatment)
• Schizo-affective disorder
• Schizophrenia
• Scotoma
• Seizures
• Severe communication disorders
• Severe depression
• Sight in one eye only
• Sleep apnoea
• Sleepiness (excessive)
• Spinal problems and injuries
• Stroke
• Subarachnoid haemorrhage
• Surgery
• Syncope
• Tachycardia
• Temporal lobe epilepsy
• Tonic clonic fits
• Tourette’s syndrome
• Transient global amnesia
• Transient ischaemic attack
• Tunnel vision
• Usher syndrome
• Valve disease or replacement valve
• Ventricular defibrillator
• Vertigo
• Vision in one eye only
• Visual acuity (reduced)
• Visual field defect
• VP shunts
• Wolff-Parkinson-White syndrome

For more information on each of these conditions, check the .