Inner most layer of human eye is-

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2022

Explanation

The retina is the innermost layer of the eyeball, also known as the neural tunic.
It is a light-sensitive tissue containing photoreceptor cells (rods and cones).
Its primary function is to receive light focused by the lens, convert the light into neural signals, and send these signals to the brain for visual recognition.
The retina develops as an outgrowth from the brain (diencephalon) during embryonic development.

Option B: The choroid is the middle vascular layer of the eye, situated between the sclera (outer layer) and the retina (inner layer).
Option C: The sclera is the tough, protective outermost layer of the eye, commonly known as the 'white of the eye'.
Option D: The cornea is the transparent front part of the eye that is continuous with the sclera. It is part of the outermost fibrous layer, not the innermost layer.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the human eye layers as background academic context rather than a clinical decision trigger.
Understanding the eye layers is crucial for diagnosing and managing conditions like retinal detachment, where the retina separates from the underlying choroid, leading to vision loss if not treated urgently.
Nurses perform fundoscopic examinations to visualize the retina, optic disc, and blood vessels. This can help detect signs of diseases like diabetic retinopathy, hypertension, and increased intracranial pressure.
What if? If a patient presents with sudden flashes of light and 'floaters' in their vision, a nurse should suspect a retinal tear or detachment, which is a medical emergency requiring immediate ophthalmologic consultation.

How to Approach the Question

First, identify the key terms in the question: 'innermost layer' and 'human eye'.
This is a direct recall question testing your knowledge of anatomy.
Mentally visualize or recall the cross-section of the eye and its layers from outside to inside.
The layers are the Sclera/Cornea (outer), Choroid (middle), and Retina (inner).
Evaluate each option based on this anatomical order.
Select the option that corresponds to the innermost layer, which is the Retina.

Concept Tested & Keywords

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E6 Histology Inderbir 11e pp. 153-155, 158-160, 157-159

Practise the full RUHS, Jaipur, PB B.Sc Nursing Entrance-2022

Attempt every question from this paper in a timed mock, then review the full solution for each one.