Eye itching in homeopathy can be differentiated based on peculiar symptoms, modalities, and associated complaints. Here are some key remedies along with their characteristic symptoms:

1. Euphrasia (Eyebright)

• Peculiar Symptoms: Profuse acrid lachrymation with bland coryza (opposite to Allium Cepa).  itchy and watery eyes along with marked redness of eyes.  Burning and smarting in eyes is also intense. It is highly useful for conjunctivitis.
• Modalities: Worse in the open air, wind, and sunlight. Better indoors and at night.
• Associated Symptoms: Intense photophobia, burning, and irritation of the eyes; frequent blinking.

2. Allium Cepa (Red Onion)

• Peculiar Symptoms: Profuse bland lachrymation with acrid nasal discharge (opposite to Euphrasia).
• Modalities: Worse in warm rooms and in the evening. Better in the open air.
• Associated Symptoms: Sneezing, nasal discharge causing irritation of the upper lip, eye redness.

3. Sulphur

• Peculiar Symptoms: Intense itching of the eyes and eyelids, especially at night; rubbing worsens the itching.
• Modalities: Worse from warmth, heat of the bed, washing, and in the morning. Better in cool air.
• Associated Symptoms: Burning sensation in the eyes, redness, dryness, and sensitivity to light.

4. Apis Mellifica

• Peculiar Symptoms: Stinging, burning, and itching of the eyes, as if bitten by an insect.
• Modalities: Worse in heat, warm rooms, and touch. Better in open air and cold applications.
• Associated Symptoms: Swelling of the eyelids (like puffy bags under the eyes), fluid-filled blisters.

5. Natrum Muriaticum

• Peculiar Symptoms: Eyes feel dry and itchy, as if sand is in them; lachrymation in open air and wind.
• Modalities: Worse in the sun, reading, and emotional stress. Better in cool air.
• Associated Symptoms: Eyelids stick together in the morning, photophobia, craving for salty foods. sneezing, watery nasal discharge and nasal congestion.

6. Argentum Nitricum

• Peculiar Symptoms: Itching and burning of the eyes with thick, yellow-green discharge.
• Modalities: Worse from heat, artificial light, and sweets. Better in the open air.
• Associated Symptoms: Sensation as if sand is in the eyes, photophobia, trembling, and anxiety.

7. Arsenicum Album

• Peculiar Symptoms: Intense burning and itching, relieved by warm applications.
• Modalities: Worse at night, cold air, and wet weather. Better from warmth.
• Associated Symptoms: Restlessness, anxiety, and frequent rubbing of the eyes.

8. Pulsatilla

• Peculiar Symptoms: Itching with thick, yellow, bland discharge.
• Modalities: Worse in warm, stuffy rooms and in the evening. Better in open air.
• Associated Symptoms: Weepy disposition, dryness of the eyes alternating with excessive lachrymation.

9. Silicea

• Peculiar Symptoms: Intense itching with a feeling of a foreign body in the eyes.
• Modalities: Worse from cold, wind, and touch. Better from warmth.
• Associated Symptoms: Suppuration of eye glands, recurrent styes, photophobia.

10. Graphites

• Peculiar Symptoms: Itchy, dry, scaly eruptions on the eyelids.
• Modalities: Worse at night, during menstruation, and from warmth. Better in cool air.
• Associated Symptoms: Cracked, rough, and sticky eyelids with discharge.

11. Ambrosia Artemisiefolia:

A remedy for hay-fever, lachrymation and intolerable itching of the eye-lids. Eye allergy when there is marked itching in the eyes. The itching is intense and intolerable. There is watering from eyes. Sneezing may attend. It is also indicated for ragweed allergy.

To select the best homeopathic remedy, consider the peculiar symptoms, modalities (aggravations and ameliorations), and associated symptoms. For example:

• If itching is accompanied by acrid lachrymation → Euphrasia
• If itching is worse from warmth and washing → Sulphur
• If itching is accompanied by burning-stinging and swelling → Apis Mellifica
• If itching is associated with a foreign body sensation → Silicea