Diseases of the Lens Practice Questions

Q: The presentation shown below is seen in:

Traumatic cataract. ***Traumatic cataract*** - The **stellate or rosette-shaped opacity** pattern shown is the classic morphological hallmark of **blunt/concussive traumatic cataract**. - This distinctive **radial spoke-like pattern** occurs due to mechanical disruption of lens fibers following **blunt ocular trauma**. *Steroid induced cataract* - Steroid-induced cataracts typically present as **posterior subcapsular cataracts** with a granular or vacuolated appearance. - They do not produce the characteristic **stellate/rosette pattern** seen in this presentation, which is specific to mechanical trauma. *Dermatogenic cataract* - Associated with **atopic dermatitis** and other skin conditions, presenting as **anterior or posterior subcapsular plaques**. - Does not exhibit the **radial spoke-like morphology** characteristic of traumatic injury shown in the image. *Rose thorn injury to lens* - Rose thorn injury is a **penetrating trauma** that creates a **localized track-pattern opacity** at the site of penetration. - Unlike the **diffuse stellate pattern** shown, penetrating injuries cause **focal lens damage** along the injury tract, not the generalized rosette appearance.

Q: A patient presents with pain, redness, and photophobia. The slit-lamp image is shown below. What is the diagnosis?

Anterior uveitis with posterior synechiae. ***Anterior uveitis with posterior synechiae*** - The image clearly shows a constricted and irregular pupil, indicative of adhesions between the **iris** and the **anterior lens capsule**. These adhesions are known as **posterior synechiae**. - Visible ciliary flush (redness around the cornea) and the presence of synechiae are classic signs of **anterior uveitis**, which involves inflammation of the iris and ciliary body. *Anterior uveitis with anterior synechiae* - While **anterior uveitis** is present, the adhesions seen are between the iris and the lens, not between the **iris** and the **cornea**. - **Anterior synechiae** involve adhesion of the iris to the cornea, which would typically present as iris tissue pulled towards the peripheral cornea or forming peripheral anterior synechiae that can lead to glaucoma. *Posterior uveitis with posterior synechiae* - **Posterior uveitis** primarily affects the **choroid** and **retina**, and its primary clinical signs are vitreous inflammation, retinal vasculitis, or choroiditis. - While posterior synechiae can sometimes occur in severe panuveitis (a complete inflammation of the uveal tract), they are not a primary feature of posterior uveitis itself, nor do they arise directly from posterior segment inflammation. *Posterior uveitis with anterior synechiae* - This option incorrectly combines **posterior uveitis** with **anterior synechiae**. - Adhesions between the iris and cornea (anterior synechiae) are associated with anterior segment pathology, and posterior uveitis does not typically cause either anterior or posterior synechiae as its primary feature.

Q: Which type of cataract is shown in the image?

Stellate cataract. ***Stellate cataract*** - The image clearly displays a star-shaped opacity, which is characteristic of a **stellate cataract**, also known as a **floriform cataract**, often associated with congenital rubella. - This type of cataract gets its name from its distinctive stellar or flower-like appearance, which is evident in the lens. *Steroid induced cataract* - **Steroid-induced cataracts** typically manifest as a **posterior subcapsular cataract**, characterized by opacities located in the posterior cortex just beneath the lens capsule. - The pattern in the image does not show the granular, plaque-like appearance or iridescence associated with posterior subcapsular cataracts. *Lamellar cataract* - A **lamellar cataract** (or zonular cataract) presents as opacities in a specific layer (lamella) of the lens, often with clear lens matter surrounding the opacified layer, appearing as concentric rings or zones. - This type of cataract does not exhibit the star-shaped pattern shown in the image. *Posterior subcapsular cataract* - **Posterior subcapsular cataracts** are characterized by granular or plaque-like opacities located at the posterior pole of the lens, often causing significant glare and difficulty with reading. - The image clearly shows a star-shaped pattern rather than the typical appearance of a posterior subcapsular cataract.

Q: What does the following image show?

Soemmering ring. ***Soemmering ring*** - The image exhibits a distinctive **ring-shaped opacity** within the lens, characteristic of a **Soemmering ring**. - This condition occurs due to the proliferation of residual lens epithelial cells and their migration post-capsulotomy, forming a ring of cortical material. *Aphakia* - **Aphakia** refers to the **absence of the crystalline lens** from the eye, which would appear as a black pupil without any lenticular structures. - The image clearly shows a complex structure behind the pupil, inconsistent with a missing lens. *Pseudophakia* - **Pseudophakia** indicates the presence of an **intraocular lens (IOL)** implanted after cataract surgery, which typically appears as a clear, artificial lens. - The observed ring-shaped opacity is not an IOL and differs significantly from the appearance of a pseudophakic eye. *Lens subluxation* - **Lens subluxation** involves the **partial displacement of the lens** from its normal position due to zonular weakness or trauma. - While it can manifest as a decentered pupil or visible zonules, the primary feature here is an organized ring of cortical material, not a dislocated lens.

Q: A 55-year-old banker presents with painless progressive loss of vision. He also complains of glare at night especially when driving back home. Recently his wife commented on the whiteness in his eye. What does the image show?

Mature cataract. ***Mature cataract*** - The image clearly shows a **completely opacified lens**, appearing milky white, which is characteristic of a mature cataract. In a **mature cataract, all cortical material has become opaque**, leading to a significant loss of vision. - The history of **painless progressive vision loss**, **glare**, and a wife commenting on the **whiteness in his eye** collectively point towards a visually significant, advanced cataract. *Immature cataract* - An immature cataract would present with **partial lens opacification**, meaning some clear lens material would still be visible, allowing for some vision. - The image shows **complete opacification**, ruling out an immature stage. *Hypermature cataract* - A **hypermature cataract** typically exhibits further degenerative changes, such as **liquefaction of cortical material** (Morgagnian cataract) where the nucleus sinks inferiorly, or a shrunken, wrinkled capsule (sclerotic hypermature cataract). - The image does not show these features; the lens appears uniformly opaque without signs of shrinkage or nuclear displacement. *Hypermature sclerotic cataract* - A **hypermature sclerotic cataract** would involve significant **shrinking and wrinkling of the lens capsule** due to water loss, making the lens appear smaller and often causing the anterior chamber to deepen. - The lens in the image is full and well-maintained within the capsule, with no signs of shrinkage or obvious anterior chamber deepening.

Q: What does the following image show?

Blue dot cataract. ***Blue dot cataract*** - The image shows numerous small, discrete, bluish-white opacities scattered throughout the **lens cortex**, which are characteristic of **blue dot cataract**, also known as punctate cerulean cataract. - This type of cataract is often congenital or developmental, typically **non-progressive**, and usually has little to no impact on visual acuity. *Anterior polar cataract* - An anterior polar cataract presents as a **well-demarcated, whitish opacity located at the center of the anterior lens capsule**. - It usually appears as a single, distinct spot, differing significantly from the widespread blue dots seen in the image. *Posterior polar cataract* - A posterior polar cataract is an opacity located at the **center of the posterior lens capsule**, often appearing as a disc-shaped lesion. - It is distinct from the numerous anterior cortical punctate opacities shown in the image and has a higher risk of posterior capsular rupture during surgery. *Cuneiform cataract* - Also known as cortical cataract, cuneiform cataracts present as **wedge-shaped or spoke-like opacities** that start in the periphery of the lens cortex and gradually extend towards the center. - The appearance in the image is of scattered dots, not the characteristic spokes of a cuneiform cataract.

Q: What does the following image show?

Cupuliform cataract. ***Cupuliform cataract*** - The image displays a **posterior subcapsular cataract** with a characteristic **cup-shaped opacity** located in the posterior cortex of the lens. - This type of cataract is often associated with conditions such as **diabetes**, chronic steroid use, and inflammatory eye diseases. *Anterior polar cataract* - This type of cataract would appear as a **small, well-defined, white opacity** on the anterior surface of the lens capsule, usually congenital, which is not what is shown. - It would be located at the **central anterior pole** of the lens, contrasting with the posterior location seen here. *Blue dot cataract* - This refers to **punctate blue opacities** scattered throughout the lens, a type of pulverulent cataract, typically congenital and often asymptomatic. - The diffuse, cup-shaped, and more significant opacity in the image does not fit the description of a blue dot cataract. *Cuneiform cataract* - Also known as **cortical cataracts**, these appear as **wedge-shaped opacities** starting at the periphery of the lens and extending towards the center like spokes of a wheel. - While there are some radial patterns, the predominant feature in the image is the dense, central posterior opacity, not peripheral wedges.

Q: What does the following image show?

Lens subluxation. ***Lens subluxation*** - The image clearly shows the **lens is displaced from its normal position**, with the edge of the lens visible in the pupillary aperture, which is characteristic of subluxation. - Subluxation means the **lens is partially dislocated** but remains within the pupillary area or behind the iris. *Microspherophakia* - This condition refers to a **lens that is abnormally small and spherical**, which is not depicted in this image. - While microspherophakia can sometimes be associated with subluxation, the primary feature seen here is the displacement, not the shape of the lens. *Posterior lenticonus* - **Posterior lenticonus** involves a **conical protrusion of the posterior lens capsule and cortex**, causing an "oil droplet" reflex or an irregular reflex with retroillumination. - The image shows a **displaced lens edge**, not a specific conical bulge on the posterior surface. *Blue dot cataract* - A **blue dot cataract**, also known as punctate cerulean cataract, consists of small, bluish, punctate opacities in the lens cortex. - These are typically **benign and stationary opacities** and are not shown in this image, which emphasizes lens position.

Q: A patient, three years post-surgery, presents with the condition shown in the image and complains of decreased vision. What is the most likely diagnosis?

Posterior Capsular Opacification. ***Posterior Capsular Opacification*** - The image (especially part B, the **red reflex view**) shows a cloudy membrane with **Elschnig pearls** and fibrous tissue behind the intraocular lens, which is characteristic of **PCO**. - PCO commonly occurs months to years after cataract surgery and causes **decreased vision** due to scattering of light. *Corneal Dystrophy* - Corneal dystrophies primarily affect the **cornea**, leading to various forms of corneal opacification, and would typically appear as cloudiness or irregularities within the corneal layers. - While it can cause decreased vision, the opacification seen in the image is clearly behind the iris plane and involves the posterior capsule, not the cornea. *Pseudophakic Bullous Keratopathy* - This condition involves **corneal edema** and **bullae formation** due to endothelial cell dysfunction, leading to a hazy cornea. - The image does not show corneal edema or bullae; instead, the primary pathology is located at the **posterior capsule** of the intraocular lens. *Posterior Subcapsular Cataract (PSC)* - A PSC is a type of cataract that forms **before cataract surgery** and affects the natural crystalline lens. - The patient is three years post-surgery, indicating that the natural lens has been replaced, making a PSC (of the natural lens) an impossible diagnosis in this context.

Q: Rosette cataract is seen after:

Blunt trauma to eye. ***Blunt trauma to eye*** - **Rosette cataract** is a classic finding following **blunt ocular trauma**, often due to the concussive force on the lens. - The characteristic **flower-petal or star-shaped opacity** forms in the anterior and/or posterior subcapsular regions of the lens. *Infection* - Ocular infections can lead to various complications like **uveitis** or **endophthalmitis**, but **rosette cataract** is not a typical direct sequela. - While inflammation can cause cataracts, they usually present as **inflammatory cataracts** rather than the specific rosette pattern. *Penetrating injury to eye* - **Penetrating injuries** to the eye often lead to **traumatic cataracts** due to direct lens capsule rupture. - These cataracts are typically focal and can progress rapidly, but the morphology is not usually described as a **rosette pattern** unless secondary to significant blunt force component. *Copper foreign body in eye* - A **copper foreign body** in the eye can cause **chalcosis oculi**, leading to a characteristic greenish-brown discoloration and a **sunflower cataract**. - This type of cataract has a distinct appearance from a **rosette cataract**, with a diffuse radial pattern rather than a focal star shape.

Question 1

The presentation shown below is seen in:

Accepted Answer

Traumatic cataract

Answer

Steroid induced cataract

Answer

Dermatogenic cataract

Answer

Rose thorn injury to lens

Question 2

A patient presents with pain, redness, and photophobia. The slit-lamp image is shown below. What is the diagnosis?

Accepted Answer

Anterior uveitis with posterior synechiae

Answer

Anterior uveitis with anterior synechiae

Answer

Posterior uveitis with posterior synechiae

Answer

Posterior uveitis with anterior synechiae

Question 3

Which type of cataract is shown in the image?

Accepted Answer

Stellate cataract

Answer

Steroid induced cataract

Answer

Lamellar cataract

Answer

Posterior subcapsular cataract

Question 4

What does the following image show?

Accepted Answer

Soemmering ring

Answer

Aphakia

Answer

Pseudophakia

Answer

Lens subluxation

Question 5

A 55-year-old banker presents with painless progressive loss of vision. He also complains of glare at night especially when driving back home. Recently his wife commented on the whiteness in his eye. What does the image show?

Accepted Answer

Mature cataract

Answer

Immature cataract

Answer

Hypermature cataract

Answer

Hypermature sclerotic cataract

Question 6

What does the following image show?

Accepted Answer

Blue dot cataract

Answer

Anterior polar cataract

Answer

Posterior polar cataract

Answer

Cuneiform cataract

Question 7

What does the following image show?

Accepted Answer

Cupuliform cataract

Answer

Anterior polar cataract

Answer

Blue dot cataract

Answer

Cuneiform cataract

Question 8

What does the following image show?

Accepted Answer

Lens subluxation

Answer

Microspherophakia

Answer

Posterior lenticonus

Answer

Blue dot cataract

Question 9

A patient, three years post-surgery, presents with the condition shown in the image and complains of decreased vision. What is the most likely diagnosis?

Accepted Answer

Posterior Capsular Opacification

Answer

Corneal Dystrophy

Answer

Posterior Subcapsular Cataract (PSC)

Answer

Pseudophakic Bullous Keratopathy

Question 10

Rosette cataract is seen after:

Accepted Answer

Blunt trauma to eye

Answer

Infection

Answer

Penetrating injury to eye

Answer

Copper foreign body in eye

Diseases of the Lens — MCQs

Diseases of the Lens — MCQs

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