Cataracts

What Is a Cataract?

A cataract is a clouding of the eye’s natural lens that develops gradually over time, progressively interfering with normal vision as the lens becomes increasingly opaque.¹

There are three main types of age related cataracts, nuclear, cortical, and posterior subcapsular, each affecting a different part of the lens and producing a somewhat distinct pattern of visual symptoms.²

Cataracts remain among the leading causes of preventable vision loss worldwide, though modern surgical treatment can restore clear vision for the vast majority of affected patients.

There are three main types of age related cataracts, nuclear, cortical, and posterior subcapsular, each affecting your vision in a distinct way.
National Center for Biotechnology Information

Symptoms

Common symptoms include blurred vision, difficulty seeing at night, increased sensitivity to light and glare, and seeing halos or rings of light around bright objects.²

Nuclear cataracts primarily affect distance vision and can reduce the ability to recognize faces and distinguish between colors, while cortical cataracts often cause glare and difficulty with tasks such as night driving.²

Posterior subcapsular cataracts, more common in younger patients, tend to progress relatively quickly and can paradoxically cause poor vision in bright lighting with somewhat improved vision in dim settings.²

Causes

Cataracts develop when proteins within the eye’s lens begin to break down and clump together over time, gradually clouding what is normally a clear, transparent structure.

Age related changes represent the most common underlying cause, though metabolic factors such as elevated blood glucose levels and high blood pressure also contribute meaningfully to cataract development.³

Diabetes is specifically associated with cortical and posterior subcapsular cataracts, and the combined presence of high blood pressure and diabetes has been associated with a fourfold increase in cataract risk.³

Risk Factors

Advancing age is the most significant risk factor for cataract development, with each additional year of age modestly increasing overall risk.⁴

Additional risk factors include pseudoexfoliation syndrome, limited pupillary dilation, prior history of eye inflammation called uveitis, narrow anterior chamber anatomy, and pre existing corneal opacity or secondary glaucoma.⁴

Elevated body mass index and low HDL cholesterol are specifically associated with cortical cataract development, further reflecting the broader metabolic contribution to cataract risk.³

Complications

Left untreated, cataracts can progressively worsen, eventually leading to significant visual impairment that meaningfully affects daily activities and independence.

Diabetic patients undergoing cataract surgery face an increased risk of certain postoperative complications, including fluid accumulation within the retina and clouding of the lens capsule remaining after surgery.¹

Other potential surgical complications include postoperative inflammation, increased pressure within the eye, and significant astigmatism, though these occur in a relatively small proportion of patients overall.¹

Treatment

Phacoemulsification is the most common surgical method used to treat cataracts, involving the use of ultrasound energy to break down the cloudy lens before removing the resulting fragments.¹

Following removal of the clouded natural lens, an appropriately selected artificial lens is implanted in its place, restoring clear vision for the large majority of patients.¹

A key advantage of this procedure is that it can typically be performed under intravenous drip anesthesia, requires only a short procedure duration, and does not require hospitalization.¹

Prevention

While cataracts cannot always be entirely prevented, managing underlying metabolic conditions such as diabetes and high blood pressure may help reduce the risk of earlier onset disease.³

Regular comprehensive eye examinations support earlier identification of cataracts, allowing treatment to be planned before significant vision loss occurs.

Protecting the eyes from excessive ultraviolet light exposure through appropriate sunglasses may also offer some benefit in reducing long term cataract risk.

Why Visual Communication Matters for Cataracts

Explaining how lens clouding affects vision differently depending on cataract type and location requires visuals that make these distinctions clear to patients weighing treatment options.

Pharmaceutical companies, ophthalmology practices, and medical device manufacturers rely on precise illustration and animation to explain cataract development and surgical treatment.

• Illustrating lens anatomy and the location of different cataract types
• Animating the phacoemulsification surgical procedure step by step
• Explaining intraocular lens implantation and selection
• Visualizing how different cataract types affect visual symptoms
• Supporting patient education on surgical risks and expected outcomes
• Creating training materials for ophthalmology clinicians and surgical teams

How Biotic Artlab Supports Cataract Communication

We work with pharmaceutical companies, ophthalmology practices, and medical device manufacturers to create scientifically accurate visuals that make cataract diagnosis and treatment easier to understand.

• Custom 3D animations of lens anatomy and cataract formation
• Detailed illustrations of phacoemulsification and lens implantation
• Visualizations comparing nuclear, cortical, and posterior subcapsular cataracts
• Patient facing materials on symptoms, diagnosis, and surgical options
• Clinical training content for ophthalmology surgical teams
• Conference presentations and marketing visuals for ophthalmology audiences

Frequently Asked Questions

What is a cataract?

It is a clouding of the eye’s natural lens that develops gradually and progressively affects vision.¹

What are the main types of cataracts?

Nuclear, cortical, and posterior subcapsular cataracts are the three main age related types, each affecting vision differently.²

What are common cataract symptoms?

Blurred vision, glare sensitivity, difficulty with night vision, and seeing halos around lights are common symptoms.²

What is phacoemulsification?

It is the most common cataract surgery technique, using ultrasound energy to break up and remove the clouded lens.¹

Are diabetics at higher risk for cataracts?

Yes, diabetes is specifically associated with cortical and posterior subcapsular cataract types and increases certain surgical risks.³

Can cataracts be prevented?

They cannot always be prevented, though managing metabolic conditions and protecting eyes from UV exposure may reduce risk.³

Have a Project in Mind? Contact Us.

If you are developing patient education materials, clinical training content, or marketing visuals related to cataracts, our team can help translate the science into visuals that are both accurate and easy to understand. Contact us at info@biotic-artlab.com or get in touch through our contact form to discuss your project.

References

1. National Center for Biotechnology Information. Cataract Surgery.
2. National Center for Biotechnology Information. Overview, Cataracts.
3. National Center for Biotechnology Information. Hypertension Is the Prominent Risk Factor in Cataract Patients.
4. National Center for Biotechnology Information. Cataract.

Disclaimer: This page provides general educational information and is not a substitute for diagnosis, treatment, or individualized advice from a qualified healthcare professional.