If it were my dreams I would create a script for a mental movie where my sight changed from blurry to clear and focused. You can learn how to do this in Maxwell Maltz's, "Psycho-Cybernetics." I would run that movie every night before bed. I would daydream about what it would be like to clearly see. I would think of beautiful amazing scenes I want to see in my dreams that inspire me. For me its a valley I once experienced during a guided dream session. This valley was lush and green, and covered in shrooms! In the morning I would state, three times, that, "I want to see clearly in my dreams." Use your own words for these.

One other thing you could try is something I use in what I call my Awareness Walks. This is where I go outside and walk along the road, and I become fully conscious for a short time. The details this brings out are simply beyond words, and particularly noticeable to me as I have a stigma in my left eye. It's the experience of putting on my glasses(which I rarely use) , amplified a few times. Anyhow in your dream start with your lesser senses. Smell, Hearing, Touch, Taste, Feel. Smell the air around you. Listen to the sounds around you. Taste anything of interest in the area around you. Feel your clothes, or if you have no clothes, feel the air or sun on your skin. Keep each sensation you experience in mind. Continue to smell, hear, touch and feel as you work you way through every sense other than sight, and then bring in sight at the end. The quality of your sight should increase dramatically.

Hope this helps!
- DreamBliss