Mahalakshmi D M, M. Optom
Assistant Professor, Department of Optometry, Meenakshi College of Allied Health Sciences, Kanchipuram, India
Introduction
The eyes are often described as the window to our health, and in many cases, this is true. Anaemia can affect the eye in multiple ways, sometimes even before a person notices symptoms in the rest of the body. (1) Since the retina requires a constant supply of oxygen, any condition that reduces haemoglobin (Hb) or affects blood cells can quickly lead to noticeable changes in vision and eye appearance. Understanding these eye-related signs is important because they can help in early diagnosis, indicate the severity of the underlying disease, and guide timely treatment. (2)
Ocular Changes in Anaemia and Blood Disorders
1. Conjunctival and Retinal Changes in Anaemia: Anaemia can cause noticeable eye changes, especially pale conjunctiva and retinal bleeding. These changes occur because low Hb prevents the retina from receiving adequate oxygen, making its tiny vessels fragile and prone to leakage. As anaemia becomes more severe, retinal haemorrhages and fluid accumulation become increasingly common. (1)
2. Eye Problems in Blood-Related Cancers: Many blood cancers also affect the eyes, particularly the ocular surface and retina. Patients may develop dry eyes, retinal bleeding, optic nerve swelling, red retinal patches, or blocked blood vessels. External signs like Subconjunctival Haemorrhage (SCH), eyelid drooping (Ptosis), swelling around the eyes or corneal sores may also appear. In many cases, these eye changes may occur even before the cancer is diagnosed or may signal worsening disease. (2)
3. Increasing Severity with Lower Haemoglobin Hb Levels: Studies show that more severe Anaemia leads to more pronounced retinal abnormalities. Reduced oxygen delivery damages capillaries, causing them to leak blood and form different haemorrhagic patterns. Because of this, patients with moderate to severe anaemia should undergo regular eye examinations to detect early retinal damage and prevent complications. (3)
4. Range of Ocular Signs in Nutritional Anaemia: Anaemia can produce various ocular findings, with conjunctival pallor being the most common. Other changes include retinal haemorrhages, vasodilation, cotton wool spots, macular oedema, and optic disc pallor. These abnormalities become more frequent as haemoglobin levels drop. Some patients may also experience blurred vision, eyelid swelling, or subconjunctival haemorrhages. Since the retina is highly sensitive to oxygen reduction, fundus examination plays an important role in detecting Anaemia-related eye disease early. (4)
| S.No | Type of Eye Change | Findings / Features |
|---|---|---|
| 1 | Conjunctival Changes | Pale conjunctiva (loss of redness) (1,4) |
| 2 | Retinal Haemorrhages | • Flame-shaped haemorrhages • Dot/blot haemorrhages • White-centred haemorrhages • Subhyaloid haemorrhage (1,4) |
| 3 | Retinal Vessel Abnormalities | • Venous dilation • Tortuous vessels • Vascular leakage (1,3,4) |
| 4 | Optic Nerve and Macular Changes | • Papilledema • Optic disc pallor • Macular oedema • Cotton wool spots (2,4) |
| 5 | External Eye Changes | • Subconjunctival haemorrhage • Lid swelling • Ptosis • Eye misalignment • Orbital swelling (2,4) |
| 6 | Ocular Surface Problems | • Dry eyes • Corneal ulcers (2) |
| 7 | Blood Cancer–Related Eye Issues | • Retinal bleeding • Optic nerve swelling • Blocked vessels • Conjunctival infiltration (2) |
Table 1: This table shows the ocular changes seen in Anaemia
Summary
Anaemia and blood disorders can produce a wide range of eye-related symptoms. From pale conjunctiva and retinal bleeding to optic nerve changes and external swelling, the eyes often reveal clues about the severity of the underlying condition. Since the retina depends heavily on oxygen, any drop in haemoglobin makes it susceptible to damage and leakage from fragile vessels. Regular eye examinations are essential for individuals with moderate to severe anaemia or blood cancers, as early detection of these visual signs can prevent complications and help guide proper management.
References
- Shivang Patel et al. A study of ocular manifestations in anaemic patients. Journal of Coastal Life Medicine. 2023;11(1):3112–3125.
- Bouazza, M., Youssefi, H., & Bouanani, N. (2022). Ocular Manifestations in Hematological Disorders. Cureus, 14(8), e27941. https://doi.org/10.7759/cureus.27941
- Shitole, S. C., & Jakkal, T. P. (2014). Ocular manifestations in patients with nutritional anaemia. Indian Journal of Basic and Applied Medical Research, 3(4), 89–94.
- Garg, P., & Agrawal, A. (2017). Ocular manifestations in patients with anaemia. Journal of Evidence Based Medicine and Healthcare, 4(79), 4646–4649.
About the Author
Mahalakshmi D M
Assistant Professor
Department of Optometry, Meenakshi College of Allied Health Sciences, Kanchipuram, India
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